diff --git a/QgisModelBaker/gui/panel/gpkg_config_panel.py b/QgisModelBaker/gui/panel/gpkg_config_panel.py
index cc7d2eea..1c6c8de3 100644
--- a/QgisModelBaker/gui/panel/gpkg_config_panel.py
+++ b/QgisModelBaker/gui/panel/gpkg_config_panel.py
@@ -19,6 +19,9 @@
 
 from qgis.PyQt.QtGui import QValidator
 
+# Available in typing module from v3.12 on
+from typing_extensions import override
+
 from QgisModelBaker.libs.modelbaker.utils.globals import DbActionType
 from QgisModelBaker.libs.modelbaker.utils.qt_utils import (
     FileValidator,
@@ -62,6 +65,7 @@ def __init__(self, parent, db_action_type):
 
         self.gpkg_file_line_edit.textChanged.connect(self.notify_fields_modified)
 
+    @override
     def _show_panel(self):
         if (
             self._db_action_type == DbActionType.GENERATE
@@ -96,13 +100,16 @@ def _show_panel(self):
         self.gpkg_file_line_edit.textChanged.emit(self.gpkg_file_line_edit.text())
         self.gpkg_file_browse_button.clicked.connect(file_selector)
 
+    @override
     def get_fields(self, configuration):
         configuration.dbfile = self.gpkg_file_line_edit.text().strip()
         configuration.dbschema = None
 
+    @override
     def set_fields(self, configuration):
         self.gpkg_file_line_edit.setText(configuration.dbfile)
 
+    @override
     def is_valid(self):
         result = False
         message = ""
diff --git a/QgisModelBaker/gui/panel/mssql_config_panel.py b/QgisModelBaker/gui/panel/mssql_config_panel.py
index d5fa152a..68783891 100644
--- a/QgisModelBaker/gui/panel/mssql_config_panel.py
+++ b/QgisModelBaker/gui/panel/mssql_config_panel.py
@@ -17,6 +17,9 @@
 """
 import logging
 
+# Available in typing module from v3.12 on
+from typing_extensions import override
+
 from QgisModelBaker.libs.modelbaker.utils.globals import DbActionType
 from QgisModelBaker.libs.modelbaker.utils.qt_utils import (
     NonEmptyStringValidator,
@@ -69,6 +72,7 @@ def __init__(self, parent, db_action_type):
         self.mssql_user_line_edit.textChanged.connect(self.notify_fields_modified)
         self.mssql_password_line_edit.textChanged.connect(self.notify_fields_modified)
 
+    @override
     def _show_panel(self):
         if self._db_action_type == DbActionType.GENERATE:
             self.mssql_schema_line_edit.setPlaceholderText(
@@ -85,6 +89,7 @@ def _show_panel(self):
         else:
             logging.error(f"Unknown action type: {self._db_action_type}")
 
+    @override
     def get_fields(self, configuration):
         configuration.dbhost = self.mssql_host_line_edit.text().strip()
         configuration.dbinstance = self.mssql_instance_line_edit.text().strip()
@@ -95,6 +100,7 @@ def get_fields(self, configuration):
         configuration.dbpwd = self.mssql_password_line_edit.text()
         configuration.db_odbc_driver = self.mssql_odbc_driver.currentText()
 
+    @override
     def set_fields(self, configuration):
         self.mssql_host_line_edit.setText(configuration.dbhost)
         self.mssql_instance_line_edit.setText(configuration.dbinstance)
@@ -108,6 +114,7 @@ def set_fields(self, configuration):
         if index != -1:
             self.mssql_odbc_driver.setCurrentIndex(index)
 
+    @override
     def is_valid(self):
         result = False
         message = ""
diff --git a/QgisModelBaker/gui/panel/pg_config_panel.py b/QgisModelBaker/gui/panel/pg_config_panel.py
index 6972b598..311dd20d 100644
--- a/QgisModelBaker/gui/panel/pg_config_panel.py
+++ b/QgisModelBaker/gui/panel/pg_config_panel.py
@@ -21,6 +21,9 @@
 
 from qgis.PyQt.QtCore import Qt, QThread, QTimer
 
+# Available in typing module from v3.12 on
+from typing_extensions import override
+
 import QgisModelBaker.libs.modelbaker.libs.pgserviceparser as pgserviceparser
 import QgisModelBaker.libs.modelbaker.utils.db_utils as db_utils
 from QgisModelBaker.libs.modelbaker.iliwrapper.globals import DbIliMode
@@ -186,6 +189,7 @@ def __del__(self):
         except RuntimeError:
             pass
 
+    @override
     def _show_panel(self):
 
         self._fill_schema_combo_box()
@@ -204,6 +208,7 @@ def _show_panel(self):
         else:
             logging.error(f"Unknown action type: {self._db_action_type}")
 
+    @override
     def get_fields(self, configuration):
 
         configuration.dbservice = self.pg_service_combo_box.currentData()
@@ -219,6 +224,7 @@ def get_fields(self, configuration):
 
         configuration.db_use_super_login = self.pg_use_super_login.isChecked()
 
+    @override
     def set_fields(self, configuration):
 
         if configuration.dbservice is None:
@@ -312,6 +318,7 @@ def set_fields(self, configuration):
             self.pg_auth_settings.setConfigId(configuration.dbauthid)
             self.pg_use_super_login.setChecked(configuration.db_use_super_login)
 
+    @override
     def is_valid(self):
         result = False
         message = ""
diff --git a/requirements.txt b/requirements.txt
index 30bf0291..a3e8c1c8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 psycopg2>=2.7.4
+typing-extensions>=4.4.0
 pytest
 pyodbc
 pyyaml