diff --git a/config.dev.yml b/config.dev.yml
index 61bb3a8..8fe1ddb 100644
--- a/config.dev.yml
+++ b/config.dev.yml
@@ -1,6 +1 @@
-# Secret key (CHANGE TO RANDOM STRING IN PRODUCTION!)
 SECRET_KEY: 'development'
-
-# Database configuration
-SQLALCHEMY_DATABASE_URI: 'sqlite:////tmp/test.db'
-SQLALCHEMY_ECHO: false
diff --git a/development.env b/development.env
index 3cd6d84..5faadd5 100644
--- a/development.env
+++ b/development.env
@@ -1,6 +1,3 @@
 FLASK_APP=tofu_api.app
 FLASK_ENV=development
 FLASK_CONFIG_FILE=config.dev.yml
-
-# Show SQLAlchemy 2.0 deprecation warnings
-SQLALCHEMY_WARN_20=1
diff --git a/tofu_api/app.py b/tofu_api/app.py
index d7a6237..f5a2038 100644
--- a/tofu_api/app.py
+++ b/tofu_api/app.py
@@ -1,28 +1,17 @@
 import os
-import sys
-import warnings
 
+import yaml
 from flask import Flask
 
 from tofu_api.api import TofuApiBlueprint
-from tofu_api.common.config import Config
+from tofu_api.config import DefaultConfig
 from tofu_api.dependencies import Dependencies
 
-# Enable deprecation warnings in dev environment
-if not sys.warnoptions and os.getenv('FLASK_ENV') == 'development':
-    warnings.filterwarnings('default', module='tofu_api.*')
-
 
 class App(Flask):
     """
     Flask application for Tofu API.
     """
-    # Override Flask classes
-    config_class = Config
-
-    # Set type hint for config
-    config: Config
-
     # Dependencies container
     dependencies: Dependencies
 
@@ -36,9 +25,10 @@ class App(Flask):
             instance_path=project_root_dir,
             instance_relative_config=True,
         )
+        self.config.from_object(DefaultConfig)
 
         # Load app configuration from YAML file
-        self.config.from_yaml(os.getenv('FLASK_CONFIG_FILE', default='config.yml'))
+        self.config.from_file(os.getenv('FLASK_CONFIG_FILE', default='config.yml'), load=yaml.safe_load)
 
         # Initialize DI container
         self.dependencies = Dependencies()
diff --git a/tofu_api/common/config/__init__.py b/tofu_api/common/config/__init__.py
deleted file mode 100644
index d7bf64b..0000000
--- a/tofu_api/common/config/__init__.py
+++ /dev/null
@@ -1,2 +0,0 @@
-from .config import Config
-from .defaults import DefaultConfig
diff --git a/tofu_api/common/config/config.py b/tofu_api/common/config/config.py
deleted file mode 100644
index 37186bd..0000000
--- a/tofu_api/common/config/config.py
+++ /dev/null
@@ -1,32 +0,0 @@
-import yaml
-from flask import Config as BaseConfig
-
-from .defaults import DefaultConfig
-
-
-class Config(BaseConfig):
-    """
-    Custom config class for the Flask application.
-    """
-
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-
-        # Set app-specific default values
-        self.from_object(DefaultConfig)
-
-    def from_yaml(self, filename: str, *, silent: bool = False) -> bool:
-        """
-        Update config from a YAML file.
-        """
-        return self.from_file(filename, load=yaml.safe_load, silent=silent)
-
-    # Properties for type safe access to config values
-
-    @property
-    def sqlalchemy_database_uri(self) -> str:
-        return self.get('SQLALCHEMY_DATABASE_URI')
-
-    @property
-    def sqlalchemy_echo(self) -> bool:
-        return bool(self.get('SQLALCHEMY_ECHO'))
diff --git a/tofu_api/common/config/defaults.py b/tofu_api/common/config/defaults.py
deleted file mode 100644
index 9ff5c29..0000000
--- a/tofu_api/common/config/defaults.py
+++ /dev/null
@@ -1,13 +0,0 @@
-__all__ = [
-    'DefaultConfig',
-]
-
-
-class DefaultConfig:
-    """
-    This class defines default values for the app configuration.
-    """
-
-    # Database configuration
-    SQLALCHEMY_DATABASE_URI = None
-    SQLALCHEMY_ECHO = False
diff --git a/tofu_api/common/database/sqlalchemy.py b/tofu_api/common/database/sqlalchemy.py
index 1d1cbe9..f3ab214 100644
--- a/tofu_api/common/database/sqlalchemy.py
+++ b/tofu_api/common/database/sqlalchemy.py
@@ -5,7 +5,6 @@ from sqlalchemy import MetaData, create_engine
 from sqlalchemy.engine import Engine
 from sqlalchemy.orm import Session, scoped_session, sessionmaker
 
-from tofu_api.common.config import Config
 from .metadata import metadata_obj
 
 __all__ = [
@@ -24,22 +23,19 @@ class SQLAlchemy:
         """
         Initializes the SQLAlchemy engine.
         """
-        self._engine = self._create_engine(app.config)
+        self._engine = self._create_engine()
         self._scoped_session = self._create_scoped_session()
 
         @app.teardown_appcontext
         def shutdown_session(_exception=None):
             self._scoped_session.remove()
 
-    @staticmethod
-    def _create_engine(config: Config) -> Engine:
+    def _create_engine(self) -> Engine:
         """
         Create the database engine using the app configuration.
         """
-        return create_engine(
-            config.sqlalchemy_database_uri,
-            echo=config.sqlalchemy_echo,
-        )
+        # TODO: Use config
+        return create_engine('sqlite:////tmp/test.db')
 
     def _create_scoped_session(self) -> scoped_session:
         """
diff --git a/tofu_api/config.py b/tofu_api/config.py
new file mode 100644
index 0000000..fbca7a3
--- /dev/null
+++ b/tofu_api/config.py
@@ -0,0 +1,5 @@
+class DefaultConfig:
+    """
+    This class defined default values for the app configuration.
+    """
+    # TODO