diff --git a/requirements.txt b/requirements.txt
index 712d9fc5e..316d0b8be 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,20 +8,26 @@
 #
 ###############################################################################
 
-Flask==2.2.*
+Flask==2.3.*; python_version > '3.7'
+Flask==2.2.*; python_version <= '3.7'
 Flask-Gravatar==0.*
 Flask-Login==0.*
 Flask-Mail==0.*
 Flask-Migrate==4.*
 greenlet==1.1.2;  python_version <= '3.10'
-Flask-SQLAlchemy==3.0.*
-Flask-WTF==1.1.1
+Flask-SQLAlchemy==3.1.*; python_version > '3.7'
+Flask-SQLAlchemy==3.0.*; python_version <= '3.7'
+Flask-WTF==1.2.*; python_version > '3.7'
+Flask-WTF==1.1.1; python_version <= '3.7'
 Flask-Compress==1.*
 Flask-Paranoid==0.*
-Flask-Babel==3.1.*
-Flask-Security-Too==5.1.*
+Flask-Babel==4.0.*; python_version > '3.7'
+Flask-Babel==3.1.*; python_version <= '3.7'
+Flask-Security-Too==5.2.*; python_version > '3.7'
+Flask-Security-Too==5.1.*; python_version <= '3.7'
 Flask-SocketIO==5.3.*
-WTForms==3.0.*
+WTForms==3.1.*; python_version > '3.7'
+WTForms==3.0.*; python_version <= '3.7'
 passlib==1.*
 pytz==2023.*
 speaklater3==1.*
@@ -51,5 +57,7 @@ azure-mgmt-subscription==3.1.1
 azure-identity==1.15.0
 google-api-python-client==2.*
 google-auth-oauthlib==1.1.0
-Werkzeug==2.2.3
-keyring==24.*
+keyring==24.*; python_version > '3.7'
+keyring==23.*; python_version <= '3.7'
+Werkzeug==2.3.*; python_version > '3.7'
+Werkzeug==2.2.3; python_version <= '3.7'
diff --git a/web/config.py b/web/config.py
index 5fe98f0bf..3b7971c0d 100644
--- a/web/config.py
+++ b/web/config.py
@@ -414,13 +414,7 @@ SECURITY_EMAIL_SUBJECT_PASSWORD_CHANGE_NOTICE = \
 ##########################################################################
 # Email address validation
 ##########################################################################
-
-# flask-security-too will validate email addresses and check deliverability
-# by default. Disable the deliverability check by default, which was the old
-# behaviour in <= v5.3
 CHECK_EMAIL_DELIVERABILITY = False
-SECURITY_EMAIL_VALIDATOR_ARGS = \
-    {"check_deliverability": CHECK_EMAIL_DELIVERABILITY}
 
 ##########################################################################
 # Upgrade checks
diff --git a/web/pgAdmin4.py b/web/pgAdmin4.py
index ce52cf613..3d4b2d134 100644
--- a/web/pgAdmin4.py
+++ b/web/pgAdmin4.py
@@ -152,6 +152,8 @@ else:
 if not app.PGADMIN_RUNTIME:
     app.wsgi_app = ReverseProxied(app.wsgi_app)
 
+app.run_before_app_start()
+
 
 ##########################################################################
 # The entry point
diff --git a/web/pgacloud/providers/_abstract.py b/web/pgacloud/providers/_abstract.py
index d9a20a297..ae110e2a6 100644
--- a/web/pgacloud/providers/_abstract.py
+++ b/web/pgacloud/providers/_abstract.py
@@ -7,6 +7,7 @@
 #
 ##########################################################################
 
+
 class AbsProvider:
     """ Abstract provider """
     parser = None
diff --git a/web/pgadmin/__init__.py b/web/pgadmin/__init__.py
index fc402b8d9..785103035 100644
--- a/web/pgadmin/__init__.py
+++ b/web/pgadmin/__init__.py
@@ -31,6 +31,7 @@ from flask_mail import Mail
 from flask_paranoid import Paranoid
 from flask_security import Security, SQLAlchemyUserDatastore, current_user
 from flask_security.utils import login_user, logout_user
+from flask_migrate import Migrate
 from werkzeug.datastructures import ImmutableDict
 from werkzeug.local import LocalProxy
 from werkzeug.utils import find_modules
@@ -79,6 +80,7 @@ class PgAdmin(Flask):
             loader=VersionedTemplateLoader(self)
         )
         self.logout_hooks = []
+        self.before_app_start = []
 
         super().__init__(*args, **kwargs)
 
@@ -105,13 +107,6 @@ class PgAdmin(Flask):
             if isinstance(blueprint, PgAdminModule):
                 yield blueprint
 
-    @property
-    def stylesheets(self):
-        stylesheets = []
-        for module in self.submodules:
-            stylesheets.extend(getattr(module, "stylesheets", []))
-        return set(stylesheets)
-
     @property
     def messages(self):
         messages = dict()
@@ -150,21 +145,6 @@ class PgAdmin(Flask):
 
         yield 'pgadmin.root', wsgi_root_path
 
-    @property
-    def javascripts(self):
-        scripts = []
-        scripts_names = []
-
-        # Remove duplicate javascripts from the list
-        for module in self.submodules:
-            module_scripts = getattr(module, "javascripts", [])
-            for s in module_scripts:
-                if s['name'] not in scripts_names:
-                    scripts.append(s)
-                    scripts_names.append(s['name'])
-
-        return scripts
-
     @property
     def menu_items(self):
         from operator import attrgetter
@@ -182,6 +162,15 @@ class PgAdmin(Flask):
                 isinstance(getattr(module, 'on_logout'), MethodType):
             self.logout_hooks.append(module)
 
+    def register_before_app_start(self, callback):
+        self.before_app_start.append(callback)
+
+    def run_before_app_start(self):
+        # call before app starts or is exported
+        with self.app_context(), self.test_request_context():
+            for callback in self.before_app_start:
+                callback()
+
 
 def _find_blueprint():
     if request.blueprint:
@@ -348,6 +337,7 @@ def create_app(app_name=None):
 
     # Create database connection object and mailer
     db.init_app(app)
+    Migrate(app, db)
 
     ##########################################################################
     # Upgrade the schema (if required)
@@ -501,8 +491,6 @@ def create_app(app_name=None):
         # CSRF Token expiration till session expires
         'WTF_CSRF_TIME_LIMIT': getattr(config, 'CSRF_TIME_LIMIT', None),
         'WTF_CSRF_METHODS': ['GET', 'POST', 'PUT', 'DELETE'],
-        # Disable deliverable check for email addresss
-        'SECURITY_EMAIL_VALIDATOR_ARGS': config.SECURITY_EMAIL_VALIDATOR_ARGS
     }))
 
     if 'SCRIPT_NAME' in os.environ and os.environ["SCRIPT_NAME"]:
diff --git a/web/pgadmin/browser/collection.py b/web/pgadmin/browser/collection.py
index 692d2261e..0faeb95d3 100644
--- a/web/pgadmin/browser/collection.py
+++ b/web/pgadmin/browser/collection.py
@@ -218,10 +218,6 @@ class CollectionNodeModule(PgAdminModule, PGChildModule, metaclass=ABCMeta):
     def node_path(self):
         return self.browser_url_prefix + self.node_type
 
-    @property
-    def javascripts(self):
-        return []
-
     @property
     def show_node(self):
         """
diff --git a/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/constraints/type.py b/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/constraints/type.py
index c3b9f0fd9..c83640ab9 100644
--- a/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/constraints/type.py
+++ b/web/pgadmin/browser/server_groups/servers/databases/schemas/tables/constraints/type.py
@@ -35,7 +35,4 @@ class ConstraintRegistry():
 
 
 class ConstraintTypeModule(CollectionNodeModule):
-    register = Blueprint.register
-
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
+    pass
diff --git a/web/pgadmin/dashboard/__init__.py b/web/pgadmin/dashboard/__init__.py
index a2d479cac..26054eedc 100644
--- a/web/pgadmin/dashboard/__init__.py
+++ b/web/pgadmin/dashboard/__init__.py
@@ -36,14 +36,6 @@ class DashboardModule(PgAdminModule):
     def get_own_menuitems(self):
         return {}
 
-    def get_own_stylesheets(self):
-        """
-        Returns:
-            list: the stylesheets used by this module.
-        """
-        stylesheets = []
-        return stylesheets
-
     def register_preferences(self):
         """
         register_preferences
diff --git a/web/pgadmin/misc/__init__.py b/web/pgadmin/misc/__init__.py
index 7a48ef217..180b34646 100644
--- a/web/pgadmin/misc/__init__.py
+++ b/web/pgadmin/misc/__init__.py
@@ -10,7 +10,8 @@
 """A blueprint module providing utility functions for the application."""
 
 from pgadmin.utils import driver
-from flask import url_for, render_template, Response, request, current_app
+from flask import render_template, Response, request, current_app
+from flask.helpers import url_for
 from flask_babel import gettext
 from flask_security import login_required
 from pgadmin.utils import PgAdminModule, replace_binary_path, \
@@ -36,10 +37,6 @@ MODULE_NAME = 'misc'
 class MiscModule(PgAdminModule):
     LABEL = gettext('Miscellaneous')
 
-    def get_own_stylesheets(self):
-        stylesheets = []
-        return stylesheets
-
     def register_preferences(self):
         """
         Register preferences for this module.
diff --git a/web/pgadmin/misc/bgprocess/__init__.py b/web/pgadmin/misc/bgprocess/__init__.py
index c9799b82a..dcc9afd9d 100644
--- a/web/pgadmin/misc/bgprocess/__init__.py
+++ b/web/pgadmin/misc/bgprocess/__init__.py
@@ -23,13 +23,6 @@ MODULE_NAME = 'bgprocess'
 
 
 class BGProcessModule(PgAdminModule):
-    def get_own_stylesheets(self):
-        """
-        Returns:
-            list: the stylesheets used by this module.
-        """
-        stylesheets = []
-        return stylesheets
 
     def get_exposed_url_endpoints(self):
         """
diff --git a/web/pgadmin/misc/cloud/__init__.py b/web/pgadmin/misc/cloud/__init__.py
index 6a31c3943..609ceeaa5 100644
--- a/web/pgadmin/misc/cloud/__init__.py
+++ b/web/pgadmin/misc/cloud/__init__.py
@@ -44,14 +44,6 @@ class CloudModule(PgAdminModule):
 
     """
 
-    def get_own_stylesheets(self):
-        """
-        Returns:
-            list: the stylesheets used by this module.
-        """
-        stylesheets = []
-        return stylesheets
-
     def get_exposed_url_endpoints(self):
         """
         Returns:
diff --git a/web/pgadmin/misc/cloud/azure/__init__.py b/web/pgadmin/misc/cloud/azure/__init__.py
index fb64b7fca..ab2f078a8 100644
--- a/web/pgadmin/misc/cloud/azure/__init__.py
+++ b/web/pgadmin/misc/cloud/azure/__init__.py
@@ -39,14 +39,6 @@ MODULE_NAME = 'azure'
 class AzurePostgresqlModule(PgAdminModule):
     """Cloud module to deploy on Azure Postgresql"""
 
-    def get_own_stylesheets(self):
-        """
-        Returns:
-            list: the stylesheets used by this module.
-        """
-        stylesheets = []
-        return stylesheets
-
     def get_exposed_url_endpoints(self):
         return ['azure.verify_credentials',
                 'azure.check_cluster_name_availability',
diff --git a/web/pgadmin/misc/cloud/biganimal/__init__.py b/web/pgadmin/misc/cloud/biganimal/__init__.py
index 4f0481b46..ccdee0ef3 100644
--- a/web/pgadmin/misc/cloud/biganimal/__init__.py
+++ b/web/pgadmin/misc/cloud/biganimal/__init__.py
@@ -32,13 +32,6 @@ EHA_CLUSTER_ARCH = 'eha'  # Extreme High Availability
 
 class BigAnimalModule(PgAdminModule):
     """Cloud module to deploy on EDB BigAnimal"""
-    def get_own_stylesheets(self):
-        """
-        Returns:
-            list: the stylesheets used by this module.
-        """
-        stylesheets = []
-        return stylesheets
 
     def get_exposed_url_endpoints(self):
         return ['biganimal.verification',
diff --git a/web/pgadmin/misc/cloud/google/__init__.py b/web/pgadmin/misc/cloud/google/__init__.py
index c07f8f3e6..35d0f1743 100644
--- a/web/pgadmin/misc/cloud/google/__init__.py
+++ b/web/pgadmin/misc/cloud/google/__init__.py
@@ -37,14 +37,6 @@ os.environ['OAUTHLIB_INSECURE_TRANSPORT'] = '1'  # Required for Oauth2
 class GooglePostgresqlModule(PgAdminModule):
     """Cloud module to deploy on Google Cloud"""
 
-    def get_own_stylesheets(self):
-        """
-        Returns:
-            list: the stylesheets used by this module.
-        """
-        stylesheets = []
-        return stylesheets
-
     def get_exposed_url_endpoints(self):
         return ['google.verify_credentials',
                 'google.projects',
diff --git a/web/pgadmin/misc/cloud/rds/__init__.py b/web/pgadmin/misc/cloud/rds/__init__.py
index 3f9de90bb..bae0e1446 100644
--- a/web/pgadmin/misc/cloud/rds/__init__.py
+++ b/web/pgadmin/misc/cloud/rds/__init__.py
@@ -34,13 +34,6 @@ MODULE_NAME = 'rds'
 
 class RDSModule(PgAdminModule):
     """Cloud module to deploy on AWS RDS"""
-    def get_own_stylesheets(self):
-        """
-        Returns:
-            list: the stylesheets used by this module.
-        """
-        stylesheets = []
-        return stylesheets
 
     def get_exposed_url_endpoints(self):
         return ['rds.db_versions',
diff --git a/web/pgadmin/preferences/__init__.py b/web/pgadmin/preferences/__init__.py
index 1167e882c..d45bdb8d9 100644
--- a/web/pgadmin/preferences/__init__.py
+++ b/web/pgadmin/preferences/__init__.py
@@ -36,9 +36,6 @@ class PreferencesModule(PgAdminModule):
     And, allows the user to modify (not add/remove) as per their requirement.
     """
 
-    def get_own_stylesheets(self):
-        return []
-
     def get_own_menuitems(self):
         return {}
 
diff --git a/web/pgadmin/setup/db_upgrade.py b/web/pgadmin/setup/db_upgrade.py
index 69d9df952..8ce10eb8c 100644
--- a/web/pgadmin/setup/db_upgrade.py
+++ b/web/pgadmin/setup/db_upgrade.py
@@ -10,13 +10,10 @@
 import os
 import flask_migrate
 
-from pgadmin import db
-
 
 def db_upgrade(app):
     from pgadmin.utils import u_encode, fs_encoding
     with app.app_context():
-        flask_migrate.Migrate(app, db)
         migration_folder = os.path.join(
             os.path.dirname(os.path.realpath(u_encode(__file__, fs_encoding))),
             os.pardir, os.pardir,
diff --git a/web/pgadmin/tools/grant_wizard/__init__.py b/web/pgadmin/tools/grant_wizard/__init__.py
index 700c8b75e..b1bc96284 100644
--- a/web/pgadmin/tools/grant_wizard/__init__.py
+++ b/web/pgadmin/tools/grant_wizard/__init__.py
@@ -42,14 +42,6 @@ class GrantWizardModule(PgAdminModule):
         javascript file.
     """
 
-    def get_own_stylesheets(self):
-        """
-        Returns:
-            list: the stylesheets used by this module.
-        """
-        stylesheets = []
-        return stylesheets
-
     def show_system_objects(self):
         """
         return system preference objects
diff --git a/web/pgadmin/tools/maintenance/__init__.py b/web/pgadmin/tools/maintenance/__init__.py
index 98ce92e44..3df34e643 100644
--- a/web/pgadmin/tools/maintenance/__init__.py
+++ b/web/pgadmin/tools/maintenance/__init__.py
@@ -35,14 +35,6 @@ class MaintenanceModule(PgAdminModule):
     """
     LABEL = _('Maintenance')
 
-    def get_own_stylesheets(self):
-        """
-        Returns:
-            list: the stylesheets used by this module.
-        """
-        stylesheets = []
-        return stylesheets
-
     def get_exposed_url_endpoints(self):
         """
         Returns:
diff --git a/web/pgadmin/utils/__init__.py b/web/pgadmin/utils/__init__.py
index 291525ad5..fd0d3dd80 100644
--- a/web/pgadmin/utils/__init__.py
+++ b/web/pgadmin/utils/__init__.py
@@ -49,19 +49,6 @@ class PgAdminModule(Blueprint):
 
         super().__init__(name, import_name, **kwargs)
 
-        def create_module_preference():
-            # Create preference for each module by default
-            if hasattr(self, 'LABEL'):
-                self.preference = Preferences(self.name, self.LABEL)
-            else:
-                self.preference = Preferences(self.name, None)
-
-            self.register_preferences()
-
-        # Create and register the module preference object and preferences for
-        # it just before the first request
-        self.before_app_first_request(create_module_preference)
-
     def register_preferences(self):
         # To be implemented by child classes
         pass
@@ -74,20 +61,25 @@ class PgAdminModule(Blueprint):
 
         super().register(app, options)
 
+        def create_module_preference():
+            # Create preference for each module by default
+            if hasattr(self, 'LABEL'):
+                self.preference = Preferences(self.name, self.LABEL)
+            else:
+                self.preference = Preferences(self.name, None)
+
+            self.register_preferences()
+
+        # Create and register the module preference object and preferences for
+        # it just before starting app
+        app.register_before_app_start(create_module_preference)
+
         for module in self.submodules:
             module.parentmodules.append(self)
             if app.blueprints.get(module.name) is None:
                 app.register_blueprint(module)
                 app.register_logout_hook(module)
 
-    def get_own_stylesheets(self):
-        """
-        Returns:
-            list: the stylesheets used by this module, not including any
-                stylesheet needed by the submodules.
-        """
-        return []
-
     def get_own_messages(self):
         """
         Returns:
@@ -111,13 +103,6 @@ class PgAdminModule(Blueprint):
         """
         return []
 
-    @property
-    def stylesheets(self):
-        stylesheets = self.get_own_stylesheets()
-        for module in self.submodules:
-            stylesheets.extend(module.stylesheets)
-        return stylesheets
-
     @property
     def messages(self):
         res = self.get_own_messages()
diff --git a/web/pgadmin/utils/validation_utils.py b/web/pgadmin/utils/validation_utils.py
index d569716bf..6d17aae97 100644
--- a/web/pgadmin/utils/validation_utils.py
+++ b/web/pgadmin/utils/validation_utils.py
@@ -19,7 +19,6 @@ def validate_email(email):
             email, check_deliverability=config.CHECK_EMAIL_DELIVERABILITY)
 
         # Update with the normalized form.
-        email = valid.email
         return True
     except EmailNotValidError as e:
         # email is not valid, exception message is human-readable
diff --git a/web/regression/python_test_utils/csrf_test_client.py b/web/regression/python_test_utils/csrf_test_client.py
index 61c7a37e8..69b9f3092 100644
--- a/web/regression/python_test_utils/csrf_test_client.py
+++ b/web/regression/python_test_utils/csrf_test_client.py
@@ -9,12 +9,13 @@
 
 import re
 import flask
-from flask import current_app, request, session, testing
+from flask import current_app, testing
 
 from werkzeug.datastructures import Headers
 from werkzeug.test import EnvironBuilder
 from flask_wtf.csrf import generate_csrf
 import config
+import sys
 
 
 class RequestShim():
@@ -26,9 +27,17 @@ class RequestShim():
 
     def set_cookie(self, key, value='', *args, **kwargs):
         "Set the cookie on the Flask test client."
-        server_name = current_app.config["SERVER_NAME"] or "localhost"
+        if sys.version_info <= (3, 7, 9999):
+            server_name = current_app.config["SERVER_NAME"] or "localhost"
+            return self.client.set_cookie(
+                server_name, key=key, value=value, *args, **kwargs
+            )
+
+        if kwargs['domain'] is None:
+            kwargs['domain'] = current_app.config["SERVER_NAME"] or "localhost"
+
         return self.client.set_cookie(
-            server_name, key=key, value=value, *args, **kwargs
+            key=key, value=value, *args, **kwargs
         )
 
     def delete_cookie(self, key, *args, **kwargs):
@@ -90,8 +99,14 @@ class TestClient(testing.FlaskClient):
         # this test client, such as the secure cookie that
         # powers `flask.session`,
         # and make a test request context that has those cookies in it.
-        environ_overrides = {}
-        self.cookie_jar.inject_wsgi(environ_overrides)
+        environ_overrides = {
+            'wsgi.url_scheme': ''
+        }
+        if sys.version_info <= (3, 7, 9999):
+            self.cookie_jar.inject_wsgi(environ_overrides)
+        else:
+            self._add_cookies_to_wsgi(environ_overrides)
+
         with self.app.test_request_context():
             # Now, we call Flask-WTF's method of generating a CSRF token...
             csrf_token = generate_csrf()
diff --git a/web/regression/runtests.py b/web/regression/runtests.py
index 77ff56e82..7c3b94b07 100644
--- a/web/regression/runtests.py
+++ b/web/regression/runtests.py
@@ -109,7 +109,9 @@ from logging import WARNING
 config.CONSOLE_LOG_LEVEL = WARNING
 
 # Create the app
-app = create_app()
+from pgAdmin4 import app
+# app = create_app()
+app.app_context().push()
 
 app.PGADMIN_INT_KEY = ''
 app.config.update({'SESSION_COOKIE_DOMAIN': None})
@@ -511,8 +513,9 @@ def execute_test(test_module_list_passed, server_passed, driver_passed,
         test_utils.create_database(server_passed, test_db_name)
 
         # Configure preferences for the test cases
-        test_utils.configure_preferences(
-            default_binary_path=server_passed['default_binary_paths'])
+        with app.app_context():
+            test_utils.configure_preferences(
+                default_binary_path=server_passed['default_binary_paths'])
 
         # Create user to run selenoid tests in parallel
         if parallel_ui_test: