diff --git a/.dockerignore b/.dockerignore
index a8ecf1f4b..ad8a40792 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -2,3 +2,8 @@
 .github
 .venv
 .semgrep_rules
+.vscode
+htmlcov
+logs
+coverage.xml
+
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8c0c25951..d79caedff 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,11 +9,11 @@ on:
 
 jobs:
   build-pex:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     strategy:
       matrix:
-        python-version: ["3.6"]
+        python-version: ["3.9"]
 
     steps:
       - uses: actions/checkout@v3
@@ -50,14 +50,13 @@ jobs:
         with:
           name: Logprep
           path: logprep.pex
-        if: matrix.python-version == 3.6
 
   test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     strategy:
       matrix:
-        python-version: ["3.6", "3.7", "3.8", "3.9"]
+        python-version: ["3.9", "3.10", "3.11"]
 
     steps:
       - uses: actions/checkout@v3
@@ -69,7 +68,8 @@ jobs:
 
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
+          sudo apt-get update && sudo apt-get -y install libhyperscan-dev librdkafka-dev
+          pip install --upgrade pip wheel
           pip install -r requirements_dev.txt
 
       - name: Perform unit tests
@@ -85,7 +85,7 @@ jobs:
           pytest  -vv tests/acceptance
 
   build-docs:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     strategy:
       matrix:
@@ -102,7 +102,8 @@ jobs:
 
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
+          sudo apt-get update && sudo apt-get -y install libhyperscan-dev librdkafka-dev
+          pip install --upgrade pip wheel
           pip install -r requirements_dev.txt
           pip install -r doc/requirements.txt
 
@@ -113,7 +114,7 @@ jobs:
           make clean html
 
   code-quality:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     strategy:
       matrix:
@@ -140,17 +141,12 @@ jobs:
 
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
+          sudo apt-get update && sudo apt-get -y install libhyperscan-dev librdkafka-dev
+          pip install --upgrade pip wheel
           pip install -r requirements_dev.txt
 
-      - name: Install semgrep if python version > 3.6
-        run: |
-          pip install semgrep
-        if: matrix.python-version == 3.7 || matrix.python-version == 3.8 || matrix.python-version == 3.9
-
       - name: check black formating
         run: |
-          pip install black
           black --check --diff --config ./pyproject.toml .
 
       - name: lint changed and added files
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 78df4c2e8..b1bfc8bce 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -11,7 +11,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [ '3.6', '3.7', '3.8', '3.9' ]
+        python-version: ["3.9"]
 
     steps:
       - uses: actions/checkout@v3
@@ -19,7 +19,7 @@ jobs:
         uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}
-          cache: 'pip'
+          cache: "pip"
 
       - name: Install dependencies
         run: |
@@ -48,14 +48,13 @@ jobs:
         with:
           name: Logprep
           path: logprep.pex
-        if: matrix.python-version == 3.6
 
   test:
     runs-on: ubuntu-latest
 
     strategy:
       matrix:
-        python-version: [ '3.6', '3.7', '3.8', '3.9' ]
+        python-version: ["3.9", "3.10", "3.11"]
 
     steps:
       - uses: actions/checkout@v3
@@ -63,11 +62,12 @@ jobs:
         uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}
-          cache: 'pip'
+          cache: "pip"
 
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
+          sudo apt-get update && sudo apt-get -y install libhyperscan-dev librdkafka-dev
+          pip install --upgrade pip wheel
           pip install -r requirements_dev.txt
 
       - name: Perform unit tests
@@ -87,7 +87,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [ '3.6', '3.7', '3.8', '3.9' ]
+        python-version: ["3.9"]
 
     steps:
       - uses: actions/checkout@v3
@@ -99,7 +99,7 @@ jobs:
         uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}
-          cache: 'pip'
+          cache: "pip"
 
       - name: Get changed python files
         id: changed-files
@@ -110,17 +110,12 @@ jobs:
 
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
+          sudo apt-get update && sudo apt-get -y install libhyperscan-dev librdkafka-dev
+          pip install --upgrade pip wheel
           pip install -r requirements_dev.txt
 
-      - name: Install semgrep if python version > 3.6
-        run: |
-          pip install semgrep
-        if: matrix.python-version == 3.7 || matrix.python-version == 3.8 || matrix.python-version == 3.9
-
       - name: check black formating
         run: |
-          pip install black
           black --check --diff --config ./pyproject.toml .
 
       - name: lint changed and added files
@@ -135,5 +130,5 @@ jobs:
         uses: codecov/codecov-action@v2
 
       - name: Check semgrep rules
-        if: steps.changed-files.outputs.all_changed_files && (matrix.python-version == 3.7 || matrix.python-version == 3.8 || matrix.python-version == 3.9)
-        run: semgrep -c .semgrep_rules -c r/python --error -l python --skip-unknown-extensions ${{ steps.changed-files.outputs.all_changed_files }}
\ No newline at end of file
+        if: steps.changed-files.outputs.all_changed_files
+        run: semgrep -c .semgrep_rules -c r/python --error -l python --skip-unknown-extensions ${{ steps.changed-files.outputs.all_changed_files }}
diff --git a/.github/workflows/publish-latest-dev-release-to-pypi.yml b/.github/workflows/publish-latest-dev-release-to-pypi.yml
index 46b8d2877..398deb390 100644
--- a/.github/workflows/publish-latest-dev-release-to-pypi.yml
+++ b/.github/workflows/publish-latest-dev-release-to-pypi.yml
@@ -17,12 +17,11 @@ jobs:
       - name: Initialize Python
         uses: actions/setup-python@v1
         with:
-          python-version: 3.6
+          python-version: 3.9
 
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
-          python -m pip install wheel
+          pip install --upgrade pip wheel
 
       - name: Build binary wheel and a source tarball
         run: python setup.py sdist bdist_wheel
diff --git a/.github/workflows/publish-release-to-pypi.yml b/.github/workflows/publish-release-to-pypi.yml
index a37bd2571..7afe482d0 100644
--- a/.github/workflows/publish-release-to-pypi.yml
+++ b/.github/workflows/publish-release-to-pypi.yml
@@ -16,13 +16,12 @@ jobs:
       - name: Initialize Python
         uses: actions/setup-python@v1
         with:
-          python-version: 3.6
-          cache: 'pip'
+          python-version: 3.9
+          cache: "pip"
 
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
-          python -m pip install wheel
+          python -m pip install --upgrade pip wheel
 
       - name: Build binary wheel and a source tarball
         run: python setup.py sdist bdist_wheel
@@ -32,4 +31,4 @@ jobs:
         uses: pypa/gh-action-pypi-publish@master
         with:
           user: __token__
-          password: ${{ secrets.PYPI_API_TOKEN }}
\ No newline at end of file
+          password: ${{ secrets.PYPI_API_TOKEN }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a3d36a8df..a94227a76 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,9 +4,19 @@
 
 ## next release
 
+### Breaking
+
+* drop support for python `3.6`, `3.7`, `3.8`
+
+### Features
+
 * Add an `http input connector` that spawns a uvicorn server which parses requests content to events.
 * provide the possibility to consume lists, rules and configuration from files and http endpoints
 
+### Improvements
+
+* add support for python `3.10` and `3.11`
+
 ## v4.0.0
 ### Breaking
 
diff --git a/Dockerfile b/Dockerfile
index cda888930..de3ef7391 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,16 +1,18 @@
-FROM python:3.9-slim as build
+FROM python:3.11-slim as build
 
 ADD . /logprep
 WORKDIR /logprep
-RUN python -m pip install --upgrade pip && python -m pip install wheel
+RUN apt-get update && apt-get -y install libhyperscan-dev librdkafka-dev
+RUN python -m pip install --upgrade pip wheel
 RUN python setup.py sdist bdist_wheel
 
 
-FROM python:3.9-slim as prod
+FROM python:3.11-slim as prod
 RUN useradd -s /bin/sh -m -c "logprep user" logprep
 USER logprep
 ENV PATH=/home/logprep/.local/bin:$PATH
 COPY --from=build /logprep/dist/logprep-0+unknown-py3-none-any.whl /
+RUN apt-get update && apt-get -y install libhyperscan-dev librdkafka-dev
 RUN pip install logprep-0+unknown-py3-none-any.whl
 ENV PROMETHEUS_MULTIPROC_DIR=/tmp/logprep/prometheus_multiproc/
 ENV TLDEXTRACT_CACHE=/tmp/logprep/tld_extract_cache/
diff --git a/README.md b/README.md
index 1bebaa268..a08dcd8d5 100644
--- a/README.md
+++ b/README.md
@@ -230,7 +230,10 @@ Details about the rule language and how to write rules for the processors can be
 
 ### Installation
 
-Python should be present on the system, currently supported are the versions 3.6 - 3.9.
+Python should be present on the system, currently supported are the versions 3.9 - 3.11.
+You have to install `hyperscan` and `rdkafka` before installing logprep. On debian based
+systems, this is performed by `sudo apt-get update && sudo apt-get -y install libhyperscan-dev librdkafka-dev`.
+
 To install Logprep you have following options:
 
 **1. Option:** Installation via PyPI: 
@@ -276,16 +279,16 @@ Those can be executed via: `tox -e [name of the test environment]`.
 For Example:
 
 ```
-tox -e py36-all
+tox -e py39-all
 ```
 
 This runs all tests, calculates the test coverage and evaluates the code quality for the python 
-3.6 version.
+3.9 version.
 
 Multiple environments can be tested within one call: 
 
 ```
-tox -e py36-all -e py37-all -e py38-all -e py39-all
+tox -e py39-all -e py310-all -e py311-all
 ```
 
 If you want to run them in parallel attach the option `-p`.
@@ -301,15 +304,12 @@ tox -av
 In case the requirements change, the test environments must be rebuilt with the parameter `-r`:
 
 ```
-tox -e all -r
+tox -e py39 -e py310 -e py311 -r
 ```
 
 ### Semgrep
 
-To run the semgrep rules against the semgrep python registry at least python 3.7 is required. 
-Because of that and the default logprep support for python 3.6 semgrep is not part of the 
-requirements_dev.txt. 
-If you want to run semgrep rules use a python environment with version higher than 3.6 and run
+If you want to run semgrep rules run
 
 ```
 pip install semgrep
@@ -318,7 +318,7 @@ pip install semgrep
 Afterwards you can just call the tox environment with for example 
 
 ```
-tox -e py37-semgrep
+tox -e py39-semgrep
 ```
 
 ### Running Logprep
diff --git a/doc/source/getting_started.rst b/doc/source/getting_started.rst
index fd0973e58..25c2eb810 100644
--- a/doc/source/getting_started.rst
+++ b/doc/source/getting_started.rst
@@ -5,7 +5,7 @@ Getting Started
 Installation
 ============
 
-Python should be present on the system, currently supported are the versions 3.6 - 3.9.
+Python should be present on the system. Currently, Python 3.9 - 3.11 are supported.
 To install Logprep you have following options:
 
 **1. Option:** Installation via PyPI:
diff --git a/logprep/abc/component.py b/logprep/abc/component.py
index 28e8435eb..b0ea9d3ca 100644
--- a/logprep/abc/component.py
+++ b/logprep/abc/component.py
@@ -1,5 +1,4 @@
 """ abstract module for connectors"""
-import sys
 from abc import ABC
 from logging import Logger
 
@@ -17,10 +16,8 @@ class Config:
         type: str = field(validator=validators.instance_of(str))
         """Type of the component"""
 
-    __slots__ = ["name", "_logger", "_config"]
-
-    if not sys.version_info.minor < 7:
-        __slots__.append("__dict__")
+    # __dict__ is added to support functools.cached_property
+    __slots__ = ["name", "_logger", "_config", "__dict__"]
 
     name: str
     _logger: Logger
diff --git a/logprep/connector/confluent_kafka/input.py b/logprep/connector/confluent_kafka/input.py
index 607765b6d..685e32150 100644
--- a/logprep/connector/confluent_kafka/input.py
+++ b/logprep/connector/confluent_kafka/input.py
@@ -27,8 +27,7 @@
         offset_reset_policy: smallest
 """
 import json
-import sys
-from functools import partial
+from functools import cached_property, partial
 from logging import Logger
 from socket import getfqdn
 from typing import Any, List, Tuple, Union
@@ -39,11 +38,6 @@
 from logprep.abc.input import CriticalInputError, Input
 from logprep.util.validators import dict_with_keys_validator
 
-if sys.version_info.minor < 8:  # pragma: no cover
-    from backports.cached_property import cached_property  # pylint: disable=import-error
-else:
-    from functools import cached_property
-
 
 class ConfluentKafkaInput(Input):
     """A kafka input connector."""
diff --git a/logprep/connector/confluent_kafka/output.py b/logprep/connector/confluent_kafka/output.py
index f46c11539..fcfd3014e 100644
--- a/logprep/connector/confluent_kafka/output.py
+++ b/logprep/connector/confluent_kafka/output.py
@@ -27,23 +27,17 @@
 """
 
 import json
-import sys
 from datetime import datetime
-from functools import partial
+from functools import cached_property, partial
 from socket import getfqdn
 from typing import List, Optional
 
 from attrs import define, field, validators
 from confluent_kafka import Producer
 
-from logprep.abc.output import Output, CriticalOutputError
+from logprep.abc.output import CriticalOutputError, Output
 from logprep.util.validators import dict_with_keys_validator
 
-if sys.version_info.minor < 8:  # pragma: no cover
-    from backports.cached_property import cached_property  # pylint: disable=import-error
-else:
-    from functools import cached_property
-
 
 class ConfluentKafkaOutput(Output):
     """A kafka connector that serves as output connector."""
diff --git a/logprep/connector/elasticsearch/output.py b/logprep/connector/elasticsearch/output.py
index 79793df9f..164c44fa0 100644
--- a/logprep/connector/elasticsearch/output.py
+++ b/logprep/connector/elasticsearch/output.py
@@ -33,7 +33,7 @@
 import json
 import re
 import ssl
-import sys
+from functools import cached_property
 from logging import Logger
 from typing import List, Optional
 
@@ -45,11 +45,6 @@
 
 from logprep.abc.output import FatalOutputError, Output
 
-if sys.version_info.minor < 8:  # pragma: no cover
-    from backports.cached_property import cached_property  # pylint: disable=import-error
-else:
-    from functools import cached_property
-
 
 class ElasticsearchOutput(Output):
     """An Elasticsearch output connector."""
diff --git a/logprep/connector/http/input.py b/logprep/connector/http/input.py
index ee1312ee0..609af7cb0 100644
--- a/logprep/connector/http/input.py
+++ b/logprep/connector/http/input.py
@@ -5,8 +5,6 @@
 A http input connector that spawns an uvicorn server and accepts http requests, parses them,
 puts them to an internal queue and pops them via :code:`get_next` method.
 
-This Processor is not supported for python 3.6 and lower versions.
-
 Example
 ^^^^^^^
 ..  code-block:: yaml
diff --git a/logprep/connector/json/input.py b/logprep/connector/json/input.py
index 0f9ce625d..3e606c14a 100644
--- a/logprep/connector/json/input.py
+++ b/logprep/connector/json/input.py
@@ -19,18 +19,14 @@
         documents_path: path/to/a/document.json
 """
 
-import sys
+from functools import cached_property
 
 from attrs import define
+
 from logprep.abc.input import Input
 from logprep.connector.dummy.input import DummyInput
 from logprep.util.json_handling import parse_json
 
-if sys.version_info.minor < 8:  # pragma: no cover
-    from backports.cached_property import cached_property  # pylint: disable=import-error
-else:
-    from functools import cached_property
-
 
 class JsonInput(DummyInput):
     """JsonInput Connector"""
diff --git a/logprep/connector/jsonl/input.py b/logprep/connector/jsonl/input.py
index 9ccae08c3..32ad459c0 100644
--- a/logprep/connector/jsonl/input.py
+++ b/logprep/connector/jsonl/input.py
@@ -19,15 +19,11 @@
         documents_path: path/to/a/document.jsonl
 
 """
-import sys
+from functools import cached_property
+
 from logprep.connector.json.input import JsonInput
 from logprep.util.json_handling import parse_jsonl
 
-if sys.version_info.minor < 8:  # pragma: no cover
-    from backports.cached_property import cached_property  # pylint: disable=import-error
-else:
-    from functools import cached_property
-
 
 class JsonlInput(JsonInput):
     """JsonlInput Connector"""
diff --git a/logprep/connector/opensearch/output.py b/logprep/connector/opensearch/output.py
index 445caac27..52dd3db43 100644
--- a/logprep/connector/opensearch/output.py
+++ b/logprep/connector/opensearch/output.py
@@ -31,18 +31,13 @@
 """
 
 import logging
-import sys
+from functools import cached_property
 
 import opensearchpy as opensearch
 
 from logprep.abc.output import FatalOutputError, Output
 from logprep.connector.elasticsearch.output import ElasticsearchOutput
 
-if sys.version_info.minor < 8:  # pragma: no cover
-    from backports.cached_property import cached_property  # pylint: disable=import-error
-else:
-    from functools import cached_property
-
 logging.getLogger("opensearch").setLevel(logging.WARNING)
 
 
diff --git a/logprep/processor/domain_label_extractor/processor.py b/logprep/processor/domain_label_extractor/processor.py
index b57b211d1..952bfb518 100644
--- a/logprep/processor/domain_label_extractor/processor.py
+++ b/logprep/processor/domain_label_extractor/processor.py
@@ -26,25 +26,18 @@
         tld_lists: /path/to/list/file
         tagging_field_name: resolved
 """
-import sys
 import ipaddress
-
+from functools import cached_property
 from typing import Optional
-from attr import define, field, validators
 
+from attr import define, field, validators
 from tldextract import TLDExtract
 
-
 from logprep.abc import Processor
 from logprep.processor.base.exceptions import DuplicationError
-from logprep.util.validators import list_of_urls_validator
 from logprep.processor.domain_label_extractor.rule import DomainLabelExtractorRule
 from logprep.util.helper import add_field_to, get_dotted_field_value
-
-if sys.version_info.minor < 8:  # pragma: no cover
-    from backports.cached_property import cached_property  # pylint: disable=import-error
-else:
-    from functools import cached_property
+from logprep.util.validators import list_of_urls_validator
 
 
 class DomainLabelExtractor(Processor):
diff --git a/logprep/processor/domain_resolver/processor.py b/logprep/processor/domain_resolver/processor.py
index 3453c7e22..7988fcac4 100644
--- a/logprep/processor/domain_resolver/processor.py
+++ b/logprep/processor/domain_resolver/processor.py
@@ -26,14 +26,14 @@
         debug_cache: false
 """
 import datetime
-import sys
 import socket
+from functools import cached_property
 from logging import Logger
 from multiprocessing import context
 from multiprocessing.pool import ThreadPool
 from typing import Optional
-from attr import define, field, validators
 
+from attr import define, field, validators
 from tldextract import TLDExtract
 
 from logprep.abc import Processor
@@ -44,11 +44,6 @@
 from logprep.util.helper import add_field_to, get_dotted_field_value
 from logprep.util.validators import list_of_urls_validator
 
-if sys.version_info.minor < 8:  # pragma: no cover
-    from backports.cached_property import cached_property  # pylint: disable=import-error
-else:
-    from functools import cached_property
-
 
 class DomainResolver(Processor):
     """Resolve domains."""
diff --git a/logprep/processor/geoip_enricher/processor.py b/logprep/processor/geoip_enricher/processor.py
index 8dcbb665e..73fd50e51 100644
--- a/logprep/processor/geoip_enricher/processor.py
+++ b/logprep/processor/geoip_enricher/processor.py
@@ -16,11 +16,11 @@
             - tests/testdata/geoip_enricher/rules/
         db_path: /path/to/GeoLite2-City.mmdb
 """
-import sys
+from functools import cached_property
 from ipaddress import ip_address
 from typing import List
-from attr import define, field
 
+from attr import define, field
 from geoip2 import database
 from geoip2.errors import AddressNotFoundError
 
@@ -29,11 +29,6 @@
 from logprep.util.helper import add_field_to, get_dotted_field_value
 from logprep.util.validators import url_validator
 
-if sys.version_info.minor < 8:  # pragma: no cover
-    from backports.cached_property import cached_property  # pylint: disable=import-error
-else:
-    from functools import cached_property
-
 
 class GeoipEnricherError(BaseException):
     """Base class for GeoipEnricher related exceptions."""
diff --git a/logprep/processor/pre_detector/processor.py b/logprep/processor/pre_detector/processor.py
index d228359ff..eadf0bec5 100644
--- a/logprep/processor/pre_detector/processor.py
+++ b/logprep/processor/pre_detector/processor.py
@@ -20,21 +20,17 @@
         pre_detector_topic: sre_topic
         alert_ip_list_path: /tmp/ip_list.yml
 """
-import sys
+from functools import cached_property
 from logging import DEBUG, Logger
 from uuid import uuid4
 
 from attr import define, field, validators
+
 from logprep.abc import Processor
 from logprep.processor.pre_detector.ip_alerter import IPAlerter
 from logprep.processor.pre_detector.rule import PreDetectorRule
 from logprep.util.validators import file_validator
 
-if sys.version_info.minor < 8:  # pragma: no cover
-    from backports.cached_property import cached_property  # pylint: disable=import-error
-else:
-    from functools import cached_property
-
 
 class PreDetectorError(BaseException):
     """Base class for PreDetector related exceptions."""
diff --git a/logprep/processor/pseudonymizer/processor.py b/logprep/processor/pseudonymizer/processor.py
index a83ff6b52..121ef6281 100644
--- a/logprep/processor/pseudonymizer/processor.py
+++ b/logprep/processor/pseudonymizer/processor.py
@@ -29,7 +29,7 @@
 """
 import datetime
 import re
-import sys
+from functools import cached_property
 from logging import Logger
 from typing import Any, List, Optional, Tuple, Union
 from urllib.parse import parse_qs
@@ -46,11 +46,6 @@
 from logprep.util.hasher import SHA256Hasher
 from logprep.util.validators import file_validator, list_of_urls_validator
 
-if sys.version_info.minor < 8:  # pragma: no cover
-    from backports.cached_property import cached_property  # pylint: disable=import-error
-else:
-    from functools import cached_property
-
 
 class Pseudonymizer(Processor):
     """Pseudonymize log events to conform to EU privacy laws."""
diff --git a/requirements.in b/requirements.in
index 9b3a939c2..ddcef2e89 100644
--- a/requirements.in
+++ b/requirements.in
@@ -1,8 +1,10 @@
+wheel
+attrs~=21.3 # because of semgrep in development
 luqum
 jsonref
 pyyaml
 ruamel.yaml
-confluent-kafka==1.8.2
+confluent-kafka<1.9.0
 pycryptodome
 urlextract
 tldextract
@@ -11,12 +13,10 @@ pygrok
 colorama
 python-dateutil
 pytz
-numpy
+numpy==1.22.1
 arrow
 prometheus_client
-hyperscan==0.1.5; python_version >= '3.6' and python_version <= '3.8' and sys_platform == 'linux' and platform_machine == 'x86_64'
-hyperscan>=0.2.0; python_version >= '3.9' and sys_platform == 'linux' and platform_machine == 'x86_64'
-backports.cached_property ; python_version < "3.8"
+hyperscan==0.2.0; sys_platform == 'linux' and platform_machine == 'x86_64'
 elasticsearch>=7,<8
 opensearch-py
 mysql-connector-python
diff --git a/requirements.txt b/requirements.txt
index b3ed67f85..a2c1ece8f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,99 +1,104 @@
 #
-# This file is autogenerated by pip-compile with python 3.6
+# This file is autogenerated by pip-compile with python 3.9
 # To update, run:
 #
-#    pip-compile requirements.in
+#    pip-compile ./requirements.in
 #
-aiohttp==3.8.1
+aiohttp==3.8.3
     # via geoip2
-aiosignal==1.2.0
+aiosignal==1.3.1
     # via aiohttp
-arrow==1.2.2
-    # via -r requirements.in
+anyio==3.6.2
+    # via starlette
+arrow==1.2.3
+    # via -r ./requirements.in
 async-timeout==4.0.2
     # via aiohttp
-asynctest==0.13.0
-    # via aiohttp
 attrs==21.4.0
-    # via aiohttp
-backports.cached-property==1.0.1 ; python_version < "3.8"
-    # via -r requirements.in
-certifi==2021.10.8
+    # via
+    #   -r ./requirements.in
+    #   aiohttp
+certifi==2022.9.24
     # via
     #   elasticsearch
     #   opensearch-py
     #   requests
-charset-normalizer==2.0.11
+charset-normalizer==2.1.1
     # via
     #   aiohttp
     #   requests
-colorama==0.4.4
-    # via -r requirements.in
+click==8.1.3
+    # via uvicorn
+colorama==0.4.6
+    # via -r ./requirements.in
 confluent-kafka==1.8.2
-    # via -r requirements.in
-elasticsearch==7.17.0
-    # via -r requirements.in
-filelock==3.4.1
+    # via -r ./requirements.in
+elasticsearch==7.17.7
+    # via -r ./requirements.in
+fastapi==0.88.0
+    # via -r ./requirements.in
+filelock==3.8.0
     # via
     #   tldextract
     #   urlextract
-frozenlist==1.2.0
+frozenlist==1.3.3
     # via
     #   aiohttp
     #   aiosignal
-geoip2==4.5.0
-    # via -r requirements.in
-hyperscan==0.1.5 ; python_version >= "3.6" and python_version <= "3.8" and sys_platform == "linux" and platform_machine == "x86_64"
-hyperscan>=0.2.0; python_version >= '3.9' and sys_platform == 'linux' and platform_machine == 'x86_64'
-    # via -r requirements.in
-idna==3.3
+geoip2==4.6.0
+    # via -r ./requirements.in
+h11==0.14.0
+    # via uvicorn
+hyperscan==0.2.0 ; sys_platform == "linux" and platform_machine == "x86_64"
+    # via -r ./requirements.in
+idna==3.4
     # via
-    #   idna-ssl
+    #   anyio
     #   requests
     #   tldextract
     #   urlextract
     #   yarl
-idna-ssl==1.1.0
-    # via aiohttp
-jsonref==0.2
-    # via -r requirements.in
-luqum==0.11.0
-    # via -r requirements.in
+jsonref==1.0.1
+    # via -r ./requirements.in
+luqum==0.12.0
+    # via -r ./requirements.in
 maxminddb==2.2.0
     # via geoip2
-multidict==5.2.0
+multidict==6.0.2
     # via
     #   aiohttp
     #   yarl
-mysql-connector-python==8.0.28
-    # via -r requirements.in
-numpy==1.19.5
-    # via -r requirements.in
+mysql-connector-python==8.0.31
+    # via -r ./requirements.in
+numpy==1.22.1
+    # via -r ./requirements.in
 opensearch-py==2.0.0
-    # via -r requirements.in
-platformdirs==2.4.0
+    # via -r ./requirements.in
+platformdirs==2.5.4
     # via urlextract
 ply==3.11
     # via luqum
-prometheus-client==0.13.1
-    # via -r requirements.in
-protobuf==3.19.4
+prometheus-client==0.15.0
+    # via -r ./requirements.in
+protobuf==3.20.1
     # via mysql-connector-python
-pycryptodome==3.14.0
-    # via -r requirements.in
+pycryptodome==3.16.0
+    # via -r ./requirements.in
+pydantic==1.10.2
+    # via fastapi
 pygrok==1.0.0
-    # via -r requirements.in
+    # via -r ./requirements.in
 python-dateutil==2.8.2
     # via
-    #   -r requirements.in
+    #   -r ./requirements.in
     #   arrow
-pytz==2021.3
-    # via -r requirements.in
+pytz==2022.6
+    # via -r ./requirements.in
 pyyaml==6.0
-    # via -r requirements.in
-regex==2022.1.18
+    # via -r ./requirements.in
+regex==2022.10.31
     # via pygrok
-requests==2.27.1
+requests==2.28.1
     # via
     #   geoip2
     #   opensearch-py
@@ -101,35 +106,37 @@ requests==2.27.1
     #   tldextract
 requests-file==1.5.1
     # via tldextract
-ruamel.yaml==0.17.20
-    # via -r requirements.in
-ruamel.yaml.clib==0.2.6
-    # via ruamel.yaml
+ruamel-yaml==0.17.21
+    # via -r ./requirements.in
+ruamel-yaml-clib==0.2.7
+    # via ruamel-yaml
 six==1.16.0
     # via
     #   python-dateutil
     #   requests-file
-tldextract==3.1.2
-    # via -r requirements.in
-typing==3.7.4.3
-    # via backports.cached-property
-typing-extensions==4.0.1
+sniffio==1.3.0
+    # via anyio
+starlette==0.22.0
+    # via fastapi
+tldextract==3.4.0
+    # via -r ./requirements.in
+typing-extensions==4.4.0
     # via
-    #   aiohttp
-    #   arrow
-    #   async-timeout
-    #   yarl
-uritools==3.0.2
+    #   pydantic
+    #   starlette
+uritools==4.0.0
     # via urlextract
-urlextract==1.5.0
-    # via -r requirements.in
-urllib3==1.26.8
+urlextract==1.7.1
+    # via -r ./requirements.in
+urllib3==1.26.13
     # via
     #   elasticsearch
     #   geoip2
     #   opensearch-py
     #   requests
-yarl==1.7.2
+uvicorn==0.20.0
+    # via -r ./requirements.in
+wheel==0.38.4
+    # via -r ./requirements.in
+yarl==1.8.1
     # via aiohttp
-fastapi==0.83.0
-uvicorn==0.17.0
diff --git a/requirements_dev.in b/requirements_dev.in
index 6eb788f17..4878474cd 100644
--- a/requirements_dev.in
+++ b/requirements_dev.in
@@ -2,3 +2,7 @@
 pytest
 pytest-cov
 pylint
+httpx
+black
+semgrep
+isort
diff --git a/requirements_dev.txt b/requirements_dev.txt
index b7d85af6b..1f362b8f0 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,228 +1,302 @@
 #
-# This file is autogenerated by pip-compile with python 3.6
+# This file is autogenerated by pip-compile with python 3.9
 # To update, run:
 #
-#    pip-compile requirements_dev.in
+#    pip-compile ./requirements_dev.in
 #
-aiohttp==3.8.1
+aiohttp==3.8.3
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   geoip2
-aiosignal==1.2.0
+aiosignal==1.3.1
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   aiohttp
-arrow==1.2.2
-    # via -r requirements.txt
-astroid==2.9.3
+anyio==3.6.2
+    # via
+    #   -r ./requirements.txt
+    #   httpcore
+    #   starlette
+arrow==1.2.3
+    # via -r ./requirements.txt
+astroid==2.12.13
     # via pylint
 async-timeout==4.0.2
     # via
-    #   -r requirements.txt
-    #   aiohttp
-asynctest==0.13.0
-    # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   aiohttp
 attrs==21.4.0
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   aiohttp
+    #   glom
+    #   jsonschema
     #   pytest
-backports.cached-property==1.0.1 ; python_version < "3.8"
-    # via -r requirements.txt
-certifi==2021.10.8
+    #   semgrep
+black==22.10.0
+    # via -r ./requirements_dev.in
+boltons==21.0.0
+    # via
+    #   face
+    #   glom
+    #   semgrep
+bracex==2.3.post1
+    # via wcmatch
+certifi==2022.9.24
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   elasticsearch
+    #   httpcore
+    #   httpx
     #   opensearch-py
     #   requests
-charset-normalizer==2.0.11
+charset-normalizer==2.1.1
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   aiohttp
     #   requests
-colorama==0.4.4
-    # via -r requirements.txt
+click==8.1.3
+    # via
+    #   -r ./requirements.txt
+    #   black
+    #   click-option-group
+    #   semgrep
+    #   uvicorn
+click-option-group==0.5.5
+    # via semgrep
+colorama==0.4.6
+    # via
+    #   -r ./requirements.txt
+    #   semgrep
 confluent-kafka==1.8.2
-    # via -r requirements.txt
-coverage[toml]==6.2
+    # via -r ./requirements.txt
+coverage[toml]==6.5.0
     # via pytest-cov
-elasticsearch==7.17.0
-    # via -r requirements.txt
-filelock==3.4.1
+defusedxml==0.7.1
+    # via semgrep
+dill==0.3.6
+    # via pylint
+elasticsearch==7.17.7
+    # via -r ./requirements.txt
+exceptiongroup==1.0.4
+    # via pytest
+face==22.0.0
+    # via glom
+fastapi==0.88.0
+    # via -r ./requirements.txt
+filelock==3.8.0
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   tldextract
     #   urlextract
-frozenlist==1.2.0
+frozenlist==1.3.3
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   aiohttp
     #   aiosignal
-geoip2==4.5.0
-    # via -r requirements.txt
-hyperscan==0.1.5 ; python_version >= "3.6" and python_version <= "3.8" and sys_platform == "linux" and platform_machine == "x86_64"
-hyperscan>=0.2.0; python_version >= '3.9' and sys_platform == 'linux' and platform_machine == 'x86_64'
-    # via -r requirements.txt
-idna==3.3
-    # via
-    #   -r requirements.txt
-    #   idna-ssl
+geoip2==4.6.0
+    # via -r ./requirements.txt
+glom==22.1.0
+    # via semgrep
+h11==0.14.0
+    # via
+    #   -r ./requirements.txt
+    #   httpcore
+    #   uvicorn
+httpcore==0.16.2
+    # via httpx
+httpx==0.23.1
+    # via -r ./requirements_dev.in
+hyperscan==0.2.0 ; sys_platform == "linux" and platform_machine == "x86_64"
+    # via -r ./requirements.txt
+idna==3.4
+    # via
+    #   -r ./requirements.txt
+    #   anyio
     #   requests
+    #   rfc3986
     #   tldextract
     #   urlextract
     #   yarl
-idna-ssl==1.1.0
-    # via
-    #   -r requirements.txt
-    #   aiohttp
-importlib-metadata==4.8.3
-    # via
-    #   pluggy
-    #   pytest
 iniconfig==1.1.1
     # via pytest
 isort==5.10.1
-    # via pylint
-jsonref==0.2
-    # via -r requirements.txt
-lazy-object-proxy==1.7.1
+    # via
+    #   -r ./requirements_dev.in
+    #   pylint
+jsonref==1.0.1
+    # via -r ./requirements.txt
+jsonschema==4.17.1
+    # via semgrep
+lazy-object-proxy==1.8.0
     # via astroid
-luqum==0.11.0
-    # via -r requirements.txt
+luqum==0.12.0
+    # via -r ./requirements.txt
 maxminddb==2.2.0
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   geoip2
-mccabe==0.6.1
+mccabe==0.7.0
     # via pylint
-multidict==5.2.0
+multidict==6.0.2
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   aiohttp
     #   yarl
-mysql-connector-python==8.0.28
-    # via -r requirements.txt
-numpy==1.19.5
-    # via -r requirements.txt
+mypy-extensions==0.4.3
+    # via black
+mysql-connector-python==8.0.31
+    # via -r ./requirements.txt
+numpy==1.22.1
+    # via -r ./requirements.txt
 opensearch-py==2.0.0
-    # via -r requirements.txt
+    # via -r ./requirements.txt
 packaging==21.3
-    # via pytest
-platformdirs==2.4.0
     # via
-    #   -r requirements.txt
+    #   pytest
+    #   semgrep
+pathspec==0.10.2
+    # via black
+peewee==3.15.4
+    # via semgrep
+platformdirs==2.5.4
+    # via
+    #   -r ./requirements.txt
+    #   black
     #   pylint
     #   urlextract
 pluggy==1.0.0
     # via pytest
 ply==3.11
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   luqum
-prometheus-client==0.13.1
-    # via -r requirements.txt
-protobuf==3.19.4
+prometheus-client==0.15.0
+    # via -r ./requirements.txt
+protobuf==3.20.1
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   mysql-connector-python
-py==1.11.0
-    # via pytest
-pycryptodome==3.14.0
-    # via -r requirements.txt
+pycryptodome==3.16.0
+    # via -r ./requirements.txt
+pydantic==1.10.2
+    # via
+    #   -r ./requirements.txt
+    #   fastapi
 pygrok==1.0.0
-    # via -r requirements.txt
-pylint==2.12.2
-    # via -r requirements_dev.in
-pyparsing==3.0.7
+    # via -r ./requirements.txt
+pylint==2.15.6
+    # via -r ./requirements_dev.in
+pyparsing==3.0.9
     # via packaging
-pytest==6.2.5
+pyrsistent==0.19.2
+    # via jsonschema
+pytest==7.2.0
     # via
-    #   -r requirements_dev.in
+    #   -r ./requirements_dev.in
     #   pytest-cov
-pytest-cov==3.0.0
-    # via -r requirements_dev.in
+pytest-cov==4.0.0
+    # via -r ./requirements_dev.in
 python-dateutil==2.8.2
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   arrow
-pytz==2021.3
-    # via -r requirements.txt
+python-lsp-jsonrpc==1.0.0
+    # via semgrep
+pytz==2022.6
+    # via -r ./requirements.txt
 pyyaml==6.0
-    # via -r requirements.txt
-regex==2022.1.18
+    # via -r ./requirements.txt
+regex==2022.10.31
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   pygrok
-requests==2.27.1
+requests==2.28.1
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   geoip2
     #   opensearch-py
     #   requests-file
+    #   semgrep
     #   tldextract
 requests-file==1.5.1
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   tldextract
-ruamel.yaml==0.17.20
-    # via -r requirements.txt
-ruamel.yaml.clib==0.2.6
+rfc3986[idna2008]==1.5.0
+    # via httpx
+ruamel-yaml==0.17.21
     # via
-    #   -r requirements.txt
-    #   ruamel.yaml
+    #   -r ./requirements.txt
+    #   semgrep
+ruamel-yaml-clib==0.2.7
+    # via
+    #   -r ./requirements.txt
+    #   ruamel-yaml
+semgrep==0.122.0
+    # via -r ./requirements_dev.in
 six==1.16.0
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   python-dateutil
     #   requests-file
-tldextract==3.1.2
-    # via -r requirements.txt
-toml==0.10.2
+sniffio==1.3.0
+    # via
+    #   -r ./requirements.txt
+    #   anyio
+    #   httpcore
+    #   httpx
+starlette==0.22.0
     # via
+    #   -r ./requirements.txt
+    #   fastapi
+tldextract==3.4.0
+    # via -r ./requirements.txt
+tomli==2.0.1
+    # via
+    #   black
+    #   coverage
     #   pylint
     #   pytest
-tomli==1.2.3
-    # via coverage
-typed-ast==1.5.4
-    # via astroid
-typing==3.7.4.3
-    # via
-    #   -r requirements.txt
-    #   backports.cached-property
-typing-extensions==4.0.1
+    #   semgrep
+tomlkit==0.11.6
+    # via pylint
+tqdm==4.64.1
+    # via semgrep
+typing-extensions==4.4.0
     # via
-    #   -r requirements.txt
-    #   aiohttp
-    #   arrow
+    #   -r ./requirements.txt
     #   astroid
-    #   async-timeout
-    #   importlib-metadata
+    #   black
+    #   pydantic
     #   pylint
-    #   yarl
-uritools==3.0.2
+    #   semgrep
+    #   starlette
+ujson==5.5.0
+    # via python-lsp-jsonrpc
+uritools==4.0.0
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   urlextract
-urlextract==1.5.0
-    # via -r requirements.txt
-urllib3==1.26.8
+urlextract==1.7.1
+    # via -r ./requirements.txt
+urllib3==1.26.13
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   elasticsearch
     #   geoip2
     #   opensearch-py
     #   requests
-wrapt==1.13.3
+    #   semgrep
+uvicorn==0.20.0
+    # via -r ./requirements.txt
+wcmatch==8.4.1
+    # via semgrep
+wheel==0.38.4
+    # via -r ./requirements.txt
+wrapt==1.14.1
     # via astroid
-yarl==1.7.2
+yarl==1.8.1
     # via
-    #   -r requirements.txt
+    #   -r ./requirements.txt
     #   aiohttp
-zipp==3.6.0
-    # via importlib-metadata
-fastapi==0.83.0
-uvicorn==0.17.0
-# The following packages are considered to be unsafe in a requirements file:
-# setuptools
diff --git a/setup.py b/setup.py
index 4975b37a3..7f544bccf 100644
--- a/setup.py
+++ b/setup.py
@@ -25,10 +25,9 @@
     classifiers=[
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
     ],
     project_urls={
         "Homepage": "https://github.com/fkie-cad/Logprep",
@@ -36,7 +35,7 @@
     },
     packages=find_packages(),
     install_requires=["setuptools"] + requirements,
-    python_requires=">=3.6",
+    python_requires=">=3.9",
     entry_points={
         "console_scripts": [
             "logprep = logprep.run_logprep:main",
diff --git a/tests/acceptance/test_http_input.py b/tests/acceptance/test_http_input.py
index ff03bdfef..6319e13c2 100644
--- a/tests/acceptance/test_http_input.py
+++ b/tests/acceptance/test_http_input.py
@@ -84,7 +84,6 @@ def teardown_function():
             pass
 
 
-@pytest.mark.skipif(sys.version_info.minor < 7, reason="not supported for python 3.6")
 def test_http_input_accepts_message_for_single_pipeline(tmp_path, config):
     output_path = tmp_path / "output.jsonl"
     config["output"] = {"testoutput": {"type": "jsonl_output", "output_file": str(output_path)}}
@@ -97,7 +96,6 @@ def test_http_input_accepts_message_for_single_pipeline(tmp_path, config):
     assert "my message" in output_path.read_text()
 
 
-@pytest.mark.skipif(sys.version_info.minor < 7, reason="not supported for python 3.6")
 def test_http_input_accepts_message_for_two_pipelines(tmp_path, config):
     config["process_count"] = 2
     output_path = tmp_path / "output.jsonl"
@@ -118,7 +116,6 @@ def test_http_input_accepts_message_for_two_pipelines(tmp_path, config):
     assert "my second message" in output_content
 
 
-@pytest.mark.skipif(sys.version_info.minor < 7, reason="not supported for python 3.6")
 def test_http_input_accepts_message_for_three_pipelines(tmp_path, config):
     config["process_count"] = 3
     output_path = tmp_path / "output.jsonl"
diff --git a/tests/unit/connector/test_http_input.py b/tests/unit/connector/test_http_input.py
index dc2bcb3b8..fb4a38b76 100644
--- a/tests/unit/connector/test_http_input.py
+++ b/tests/unit/connector/test_http_input.py
@@ -1,11 +1,9 @@
 # pylint: disable=missing-docstring
 # pylint: disable=protected-access
 # pylint: disable=attribute-defined-outside-init
-import base64
 from copy import deepcopy
 import json
 import sys
-import zlib
 
 import pytest
 import requests
@@ -17,7 +15,6 @@
 from tests.unit.connector.base import BaseInputTestCase
 
 
-@pytest.mark.skipif(sys.version_info.minor < 7, reason="not supported for python 3.6")
 class TestHttpConnector(BaseInputTestCase):
     def setup_method(self):
         super().setup_method()
@@ -41,19 +38,19 @@ def test_has_fastapi_app(self):
 
     def test_json_endpoint_accepts_post_request(self):
         data = {"message": "my log message"}
-        resp = self.client.post("/json", json.dumps(data))
+        resp = self.client.post(url="/json", data=json.dumps(data))
         assert resp.status_code == 200
 
     def test_json_message_is_put_in_queue(self):
         data = {"message": "my log message"}
-        resp = self.client.post("/json", json.dumps(data))
+        resp = self.client.post(url="/json", data=json.dumps(data))
         assert resp.status_code == 200
         event_from_queue = self.object._messages.get(timeout=0.001)
         assert event_from_queue == data
 
     def test_plaintext_endpoint_accepts_post_request(self):
         data = "my log message"
-        resp = self.client.post("/plaintext", data)
+        resp = self.client.post(url="/plaintext", data=data)
         assert resp.status_code == 200
 
     def test_plaintext_message_is_put_in_queue(self):
@@ -81,7 +78,7 @@ def test_jsonl_messages_are_put_in_queue(self):
 
     def test_get_next_returns_message_from_queue(self):
         data = {"message": "my log message"}
-        self.client.post("/json", json.dumps(data))
+        self.client.post(url="/json", data=json.dumps(data))
         assert self.object.get_next(0.001) == (data, None)
 
     def test_get_next_returns_first_in_first_out(self):
@@ -91,7 +88,7 @@ def test_get_next_returns_first_in_first_out(self):
             {"message": "third message"},
         ]
         for message in data:
-            self.client.post("/json", json.dumps(message))
+            self.client.post(url="/json", data=json.dumps(message))
         assert self.object.get_next(0.001) == (data[0], None)
         assert self.object.get_next(0.001) == (data[1], None)
         assert self.object.get_next(0.001) == (data[2], None)
@@ -105,7 +102,7 @@ def test_get_next_returns_first_in_first_out_for_mixed_endpoints(self):
         for message in data:
             endpoint, post_data = message.values()
             if endpoint == "json":
-                self.client.post("/json", json.dumps(post_data))
+                self.client.post(url="/json", data=json.dumps(post_data))
             if endpoint == "plaintext":
                 self.client.post("/plaintext", data=post_data)
         assert self.object.get_next(0.001)[0] == data[0].get("data")
diff --git a/tests/unit/processor/pseudonymizer/test_encrypter.py b/tests/unit/processor/pseudonymizer/test_encrypter.py
index ce0f4a71a..2ad4e12f2 100644
--- a/tests/unit/processor/pseudonymizer/test_encrypter.py
+++ b/tests/unit/processor/pseudonymizer/test_encrypter.py
@@ -38,7 +38,7 @@ def test_encrypt_without_loaded_keys(self):
         with pytest.raises(ValueError):
             encrypter.encrypt("foo")
 
-    @mock.patch("io.open")
+    @mock.patch("pathlib.Path.open")
     def test_load_public_keys_successfully(self, mock_open):
         mock_open.side_effect = [
             mock.mock_open(read_data=MOCK_PUBKEY_1024).return_value,
@@ -49,7 +49,7 @@ def test_load_public_keys_successfully(self, mock_open):
         assert len(str(encrypter._pubkey_analyst.n)) == 309
         assert len(str(encrypter._pubkey_depseudo.n)) == 617
 
-    @mock.patch("io.open")
+    @mock.patch("pathlib.Path.open")
     def test_load_public_keys_invalid_key(self, mock_open):
         mock_open.side_effect = [
             mock.mock_open(read_data="foo").return_value,
@@ -64,7 +64,7 @@ def test_load_public_keys_invalid_path(self):
         with pytest.raises(FileNotFoundError):
             encrypter.load_public_keys("non_existent_file_1", "non_existent_file_1")
 
-    @mock.patch("io.open")
+    @mock.patch("pathlib.Path.open")
     def test_encrypt(self, mock_open):
         mock_open.side_effect = [
             mock.mock_open(read_data=MOCK_PUBKEY_1024).return_value,
diff --git a/tests/unit/processor/test_processor_rule.py b/tests/unit/processor/test_processor_rule.py
index 081ce4732..ebbb4389e 100644
--- a/tests/unit/processor/test_processor_rule.py
+++ b/tests/unit/processor/test_processor_rule.py
@@ -41,7 +41,7 @@ class TestRule:
     )
     def test_create_rules_from_file(self, file_data, raises):
         mock_open = mock.mock_open(read_data=file_data)
-        with mock.patch("io.open", mock_open):
+        with mock.patch("pathlib.Path.open", mock_open):
             if raises:
                 error, message = raises
                 with pytest.raises(error, match=message):
diff --git a/tests/unit/util/test_configuration.py b/tests/unit/util/test_configuration.py
index 22ebde588..18655e16f 100644
--- a/tests/unit/util/test_configuration.py
+++ b/tests/unit/util/test_configuration.py
@@ -3,6 +3,7 @@
 # pylint: disable=line-too-long
 from copy import deepcopy
 from logging import getLogger
+import re
 
 import pytest
 
@@ -307,7 +308,7 @@ def test_verify_metrics_config(
                 [
                     (
                         InvalidProcessorConfigurationError,
-                        "Invalid processor config: labelername - __init__() missing 1 required keyword-only argument: 'generic_rules'",
+                        "missing 1 required keyword-only argument: 'generic_rules'",
                     )
                 ],
             ),
@@ -353,7 +354,11 @@ def test_verify_error(self, config_dict, raised_errors, test_case):
             with pytest.raises(InvalidConfigurationErrors) as e_info:
                 config.verify(logger)
             errors_set = [(type(err), str(err)) for err in e_info.value.errors]
-            assert errors_set == raised_errors, f"For test case '{test_case}'!"
+            assert len(raised_errors) == len(errors_set)
+            zipped_errors = zip(raised_errors, errors_set)
+            for expected_error, raised_error in zipped_errors:
+                assert expected_error[0] == raised_error[0], "error class differ"
+                assert re.search(expected_error[1], raised_error[1]), "error message differ"
 
     @pytest.mark.parametrize(
         "test_case, config_dict, raised_errors",
@@ -398,7 +403,7 @@ def test_verify_error(self, config_dict, raised_errors, test_case):
                 [
                     (
                         InvalidProcessorConfigurationError,
-                        "Invalid processor config: labelername - __init__() missing 1 required keyword-only argument: 'generic_rules'",
+                        "missing 1 required keyword-only argument: 'generic_rules'",
                     )
                 ],
             ),
@@ -501,7 +506,11 @@ def test_verify_errors_get_collected(self, config_dict, raised_errors, test_case
             for error in errors:
                 collected_errors += error.errors
             errors_set = [(type(error), str(error)) for error in collected_errors]
-            assert errors_set == raised_errors, f"For test case '{test_case}'!"
+            assert len(raised_errors) == len(errors_set)
+            zipped_errors = zip(raised_errors, errors_set)
+            for expected_error, raised_error in zipped_errors:
+                assert expected_error[0] == raised_error[0], "error class differ"
+                assert re.search(expected_error[1], raised_error[1]), "error message differ"
         else:
             config._verify_metrics_config()
 
diff --git a/tests/unit/util/test_getter.py b/tests/unit/util/test_getter.py
index aee77ae01..97abd8924 100644
--- a/tests/unit/util/test_getter.py
+++ b/tests/unit/util/test_getter.py
@@ -61,7 +61,7 @@ def test_factory_returns_file_getter_with_protocol(self):
 
     def test_get_returns_content(self):
         file_getter = GetterFactory.from_string("/my/file")
-        with mock.patch("io.open", mock.mock_open(read_data="my content")):
+        with mock.patch("pathlib.Path.open", mock.mock_open(read_data="my content")):
             content = file_getter.get()
             assert content == "my content"
 
@@ -151,7 +151,7 @@ def test_get_returns_content(self):
     def test_parses_content(self, method_name, input_content, expected_output):
         file_getter = GetterFactory.from_string("/my/file")
         method = getattr(file_getter, method_name)
-        with mock.patch("io.open", mock.mock_open(read_data=input_content)):
+        with mock.patch("pathlib.Path.open", mock.mock_open(read_data=input_content)):
             output = method()
             assert output == expected_output
 
diff --git a/tox.ini b/tox.ini
index 00291485e..75e3b5ae1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,12 +1,12 @@
 [tox]
-envlist = py{36,37,38,39}
-minversion = 3.6
+envlist = py{39,310,311}
+minversion = 3.9
 
 [testenv]
 deps = -rrequirements_dev.txt
 
 
-[testenv:py{36,37,38,39}-unit]
+[testenv:py{39,310,311}-unit]
 description = Run unit-tests
 usedevelop = True
 deps = {[testenv]deps}
@@ -14,7 +14,7 @@ commands =
     pytest  -vv tests/unit {posargs}
 
 
-[testenv:py{36,37,38,39}-acceptance]
+[testenv:py{39,310,311}-acceptance]
 description = Run acceptance-tests
 usedevelop = True
 deps =
@@ -24,7 +24,7 @@ commands =
     pytest  -vv -s tests/acceptance {posargs}
 
 
-[testenv:py{36,37,38,39}-lint]
+[testenv:py{39,310,311}-lint]
 description = Run pylint to determine code-quality
 usedevelop = True
 deps = pylint
@@ -42,7 +42,7 @@ commands =
     semgrep -c .semgrep_rules -c r/python --error --emacs
 
 
-[testenv:py{36,37,38,39}-docs]
+[testenv:py{39,310,311}-docs]
 description = Build sphinx HTML documentation
 changedir = doc
 usedevelop = True
@@ -58,7 +58,7 @@ commands =
     make clean html
 
 
-[testenv:py{36,37,38,39}-all]
+[testenv:py{39,310,311}-all]
 description = Run all tests with coverage and lint
 usedevelop = True
 deps =