diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 3fce49cff58187fc60d9f3b986bd2c004893d214..241d62f2cf2f02d55c303014fe8de6d609efd1bb 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -18,6 +18,7 @@ Fixed
 ~~~~~
 
 * Show link to imprint in footer
+* Fix API for adding OAuth scopes in AppConfigs
 
 Removed
 ~~~~~~~
diff --git a/aleksis/core/apps.py b/aleksis/core/apps.py
index d9a3f38fa379ddebb10073f7b5afd53301984da1..c14af908faab80f884372e60c6a7ba3ccb8378d0 100644
--- a/aleksis/core/apps.py
+++ b/aleksis/core/apps.py
@@ -138,7 +138,8 @@ class CoreConfig(AppConfig):
             # Save the associated person to pick up defaults
             user.person.save()
 
-    def get_all_scopes(self) -> dict[str, str]:
+    @classmethod
+    def get_all_scopes(cls) -> dict[str, str]:
         scopes = {
             "read": "Read anything the resource owner can read",
             "write": "Write anything the resource owner can write",
diff --git a/aleksis/core/util/apps.py b/aleksis/core/util/apps.py
index 5c31ae54acdb711d42084ac9ee4fd52d0335729a..8157f1dcf2668aac249e107b3e37c1b3676ebeed 100644
--- a/aleksis/core/util/apps.py
+++ b/aleksis/core/util/apps.py
@@ -217,22 +217,25 @@ class AppConfig(django.apps.AppConfig):
         """
         pass
 
-    def get_all_scopes(self) -> dict[str, str]:
+    @classmethod
+    def get_all_scopes(cls) -> dict[str, str]:
         """Return all OAuth scopes and their descriptions for this app."""
         return {}
 
+    @classmethod
     def get_available_scopes(
-        self,
+        cls,
         application: Optional["AbstractApplication"] = None,
         request: Optional[HttpRequest] = None,
         *args,
         **kwargs,
     ) -> list[str]:
         """Return a list of all OAuth scopes available to the request and application."""
-        return list(self.get_all_scopes().keys())
+        return list(cls.get_all_scopes().keys())
 
+    @classmethod
     def get_default_scopes(
-        self,
+        cls,
         application: Optional["AbstractApplication"] = None,
         request: Optional[HttpRequest] = None,
         *args,