diff --git a/Dockerfile b/Dockerfile
index df8680b..0666a30 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.8-alpine AS builder
+FROM python:3.8.20-alpine3.20 AS builder
 WORKDIR /prom2teams
 COPY LICENSE \
         MANIFEST.in \
@@ -8,10 +8,14 @@ COPY LICENSE \
         ./
 COPY prom2teams/ prom2teams
 COPY bin/ bin
+RUN apk add --no-cache gcc musl-dev libffi-dev pcre-dev
+RUN pip install --upgrade pip && \
+    pip install --upgrade setuptools==65.5.1 && \
+    pip install Flask==2.2.5 Werkzeug==2.2.3 uWSGI==2.0.22
 RUN apk add gcc libc-dev yaml-dev linux-headers --no-cache \
         && python setup.py bdist_wheel
 
-FROM python:3.8-alpine
+FROM python:3.8.20-alpine3.20
 LABEL maintainer="labs@idealista.com"
 EXPOSE 8089
 EXPOSE 9090
@@ -19,8 +23,13 @@ WORKDIR /opt/prom2teams
 COPY docker/rootfs .
 COPY --from=builder /prom2teams/dist .
 COPY bin/wsgi.py ./wsgi.py
+RUN apk add --no-cache gcc musl-dev libffi-dev pcre-dev && \
+    pip install --upgrade pip && \
+    pip install --upgrade setuptools==70.0.0 && \
+    pip install Flask==2.2.5 Werkzeug==2.2.3 uWSGI==2.0.22
 RUN apk add gcc libc-dev yaml-dev linux-headers pcre pcre-dev --no-cache \
-	&& pip install prom2teams*.whl
+        && pip install prom2teams*.whl
+RUN apk del gcc musl-dev libffi-dev
 RUN addgroup -g "101" -S prom2teams && \
         adduser -S prom2teams -G prom2teams -u "101" && \
         mkdir -p /var/log/prom2teams && \
diff --git a/bin/prom2teams b/bin/prom2teams
index 493451f..47437a8 100644
--- a/bin/prom2teams
+++ b/bin/prom2teams
@@ -1,7 +1,10 @@
 #!/usr/bin/env python3
 import sys
 import os
-from werkzeug.serving import run_simple
+from functools import cached_property
+from flask import Flask
+
+app = Flask(__name__)
 
 try:
     from prom2teams.app.api import app as application
@@ -9,10 +12,11 @@ except ImportError:
     sys.path.append(os.path.abspath('./'))
     from prom2teams.app.api import app as application
 
+
 if __name__ == "__main__":
     application.config['ENV'] = "werkzeug"
     host = application.config['HOST']
     port = int(application.config['PORT'])
-    run_simple(hostname=host, port=port, application=application, use_reloader=True,
+    app.run(hostname=host, port=port, application=application, use_reloader=True,
                reloader_type='stat', reloader_interval=5, extra_files=[application.config['APP_CONFIG_FILE']])
 
diff --git a/prom2teams/app/configuration.py b/prom2teams/app/configuration.py
index eda7b36..b3fd66e 100644
--- a/prom2teams/app/configuration.py
+++ b/prom2teams/app/configuration.py
@@ -1,4 +1,5 @@
 import argparse
+from configparser import RawConfigParser
 import configparser
 import logging.config
 
@@ -60,7 +61,7 @@ def _update_application_configuration(application, configuration):
 
 
 def _config_provided(filepath):
-    config = configparser.ConfigParser()
+    config = RawConfigParser()
     try:
         with open(filepath) as f_prov:
             config.read_file(f_prov)
diff --git a/prom2teams/app/versions/v1/__init__.py b/prom2teams/app/versions/v1/__init__.py
index cf65a5a..697f5f2 100644
--- a/prom2teams/app/versions/v1/__init__.py
+++ b/prom2teams/app/versions/v1/__init__.py
@@ -1,5 +1,5 @@
 import logging
-from flask_restplus import Api
+from flask_restx import Api
 
 log = logging.getLogger(__name__)
 
diff --git a/prom2teams/app/versions/v1/model.py b/prom2teams/app/versions/v1/model.py
index efec48f..427d996 100644
--- a/prom2teams/app/versions/v1/model.py
+++ b/prom2teams/app/versions/v1/model.py
@@ -1,4 +1,4 @@
-from flask_restplus import fields
+from flask_restx import fields
 from . import api_v1
 
 annotations = api_v1.model('annotations', {
diff --git a/prom2teams/app/versions/v1/namespace.py b/prom2teams/app/versions/v1/namespace.py
index 6af7310..3d64a17 100644
--- a/prom2teams/app/versions/v1/namespace.py
+++ b/prom2teams/app/versions/v1/namespace.py
@@ -1,7 +1,7 @@
 import warnings
 
 from flask import request, current_app as app
-from flask_restplus import Resource
+from flask_restx import Resource
 
 from prom2teams.app.sender import AlertSender
 from prom2teams.prometheus.message_schema import MessageSchema
diff --git a/prom2teams/app/versions/v2/__init__.py b/prom2teams/app/versions/v2/__init__.py
index 1b4d1b8..cfb500f 100644
--- a/prom2teams/app/versions/v2/__init__.py
+++ b/prom2teams/app/versions/v2/__init__.py
@@ -1,5 +1,6 @@
 import logging
-from flask_restplus import Api
+from flask_restx import Api
+from werkzeug.exceptions import HTTPException
 
 log = logging.getLogger(__name__)
 
@@ -9,6 +10,26 @@
 
 @api_v2.errorhandler
 def default_error_handler(e):
+    # Define a default error message at the start
     msg = 'An unhandled exception occurred.'
-    log.exception(msg + e)
-    return {'message': msg}, 500
+
+    # Log the full stack trace for debugging
+    # log.exception(f"{msg}: {str(e)}\n{traceback.format_exc()}")
+
+    # Customize the response based on the type of exception
+    if isinstance(e, HTTPException):
+        # Set a specific message for HTTPException
+        msg = e.description
+        # Return a dictionary for the HTTPException's description and code
+        return {'message': msg}, e.code
+    elif isinstance(e, ValueError):
+        # For ValueError, set a specific message and return a 400 Bad Request code
+        msg = 'Invalid value provided.'
+        return {'message': msg}, 400
+    elif isinstance(e, KeyError):
+        # For KeyError, set a specific message and return a 400 Bad Request code
+        msg = 'Missing required data or missing Connector.'
+        return {'message': msg}, 400
+    else:
+        # Generic response for other unhandled exceptions
+        return {'message': msg}, 500
\ No newline at end of file
diff --git a/prom2teams/app/versions/v2/model.py b/prom2teams/app/versions/v2/model.py
index 2e7c188..431de77 100644
--- a/prom2teams/app/versions/v2/model.py
+++ b/prom2teams/app/versions/v2/model.py
@@ -1,4 +1,4 @@
-from flask_restplus import fields
+from flask_restx import fields
 from . import api_v2
 
 annotations = api_v2.model('annotations', {
diff --git a/prom2teams/app/versions/v2/namespace.py b/prom2teams/app/versions/v2/namespace.py
index e2e445e..1304aff 100644
--- a/prom2teams/app/versions/v2/namespace.py
+++ b/prom2teams/app/versions/v2/namespace.py
@@ -1,5 +1,5 @@
 from flask import request, current_app as app
-from flask_restplus import Resource
+from flask_restx import Resource
 
 from prom2teams.app.sender import AlertSender
 from prom2teams.prometheus.message_schema import MessageSchema
diff --git a/requirements.txt b/requirements.txt
index 020111b..1bfb49b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,15 +1,15 @@
-requests==2.20.1
-flask-restplus==0.12.1
+requests==2.32.0
+flask-restx==1.3.0
 marshmallow==3.0.0rc6
-jinja2==2.11.3
-Flask==1.0.2
+jinja2==3.1.4
+Flask==2.2.5
 pyyaml==6.0.1
-uwsgi==2.0.20
-prometheus_flask_exporter==0.9.0
-werkzeug==0.16.1
+uwsgi==2.0.22
+prometheus_flask_exporter==0.23.1
+werkzeug==3.0.3
 DeepDiff==4.3.0
-zipp==3.1.0
-MarkupSafe==1.1.1
+zipp==3.19.1
+MarkupSafe==2.1.5
 pyrsistent==0.16.0
 tenacity==6.2.0
 itsdangerous==2.0.1