diff --git a/foca/models/config.py b/foca/models/config.py
index 73c1afb..a0e80e6 100644
--- a/foca/models/config.py
+++ b/foca/models/config.py
@@ -12,7 +12,6 @@
     Dict,
     List,
     Optional,
-    Self,
     Tuple,
     Type,
     Union,
@@ -26,6 +25,7 @@
     model_validator,
 )
 from pymongo import collection, database
+from typing_extensions import Self
 
 from foca.security.access_control.constants import (
     ACCESS_CONTROL_BASE_PATH,
diff --git a/requirements_dev.txt b/requirements_dev.txt
index d79bf82..7e66e87 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -10,3 +10,4 @@ types-PyYAML
 types-requests
 types-setuptools
 types-urllib3
+typing_extensions>=4.11