diff --git a/doc/source/custom_extensions/security_best_practices.py b/doc/source/custom_extensions/security_best_practices.py
index 033f469f7..24f2cd21f 100644
--- a/doc/source/custom_extensions/security_best_practices.py
+++ b/doc/source/custom_extensions/security_best_practices.py
@@ -181,7 +181,9 @@ def create_xls_checklist(app, env):
         )
     dataframe = pd.DataFrame(description)
     download_file_name = "security-best-practices-check-list"
-    download_file_obj = [env.dlfiles[key] for key in env.dlfiles if download_file_name in key][0]
+    download_file_obj = [env.dlfiles[key] for key in env.dlfiles if download_file_name in str(key)][
+        0
+    ]
     download_file_path = download_file_obj[1]
     full_file_path = f"{app.outdir}/_downloads/{download_file_path}"
     writer = pd.ExcelWriter(full_file_path, engine="openpyxl")
diff --git a/logprep/connector/http/input.py b/logprep/connector/http/input.py
index b64700b6a..0ab7599d7 100644
--- a/logprep/connector/http/input.py
+++ b/logprep/connector/http/input.py
@@ -56,11 +56,12 @@
 .. security-best-practice::
    :title: Http Input Connector - Authentication
 
-    When using basic auth with the http input connector
-    the following points should be taken into account:
-        - basic auth must only be used with strong passwords
-        - basic auth must only be used with TLS encryption
-        - avoid to reveal your plaintext secrets in public repositories
+   When using basic auth with the http input connector
+   the following points should be taken into account:
+
+       - basic auth must only be used with strong passwords
+       - basic auth must only be used with TLS encryption
+       - avoid to reveal your plaintext secrets in public repositories
 
 Behaviour of HTTP Requests
 ^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -86,7 +87,7 @@
 from abc import ABC
 from base64 import b64encode
 from functools import cached_property
-from typing import Callable, List, Mapping, Tuple, Union
+from typing import Callable, List, Mapping, Tuple, Type, Union
 
 import falcon.asgi
 import msgspec
@@ -104,7 +105,7 @@
 from logprep.abc.input import FatalInputError, Input
 from logprep.metrics.metrics import CounterMetric, GaugeMetric
 from logprep.util import http, rstr
-from logprep.util.credentials import CredentialsFactory
+from logprep.util.credentials import Credentials, CredentialsFactory
 
 logger = logging.getLogger("HTTPInput")
 
@@ -212,13 +213,13 @@ class HttpEndpoint(ABC):
         Includes authentication credentials, if unset auth is disabled
     """
 
-    # pylint: disable=too-many-arguments,too-many-positional-arguments
+    # pylint: disable=too-many-arguments
     def __init__(
         self,
         messages: mp.Queue,
         collect_meta: bool,
         metafield_name: str,
-        credentials: dict,
+        credentials: Credentials,
         metrics: "HttpInput.Metrics",
     ) -> None:
         self.messages = messages
@@ -414,11 +415,11 @@ class Config(Input.Config):
         metafield_name: str = field(validator=validators.instance_of(str), default="@metadata")
         """Defines the name of the key for the collected metadata fields"""
 
-    __slots__ = []
+    __slots__: List[str] = ["target", "app", "http_server"]
 
     messages: mp.Queue = None
 
-    _endpoint_registry: Mapping[str, HttpEndpoint] = {
+    _endpoint_registry: Mapping[str, Type[HttpEndpoint]] = {
         "json": JSONHttpEndpoint,
         "plaintext": PlaintextHttpEndpoint,
         "jsonl": JSONLHttpEndpoint,
diff --git a/pyproject.toml b/pyproject.toml
index ae26d243c..37c84a085 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -114,7 +114,7 @@ dev = [
 ]
 
 doc = [
-  "sphinx",
+  "sphinx<8.2.0",
   "sphinx_rtd_theme",
   "sphinxcontrib.datatemplates",
   "sphinxcontrib-mermaid",