diff --git a/src/ai/backend/manager/container_registry/base.py b/src/ai/backend/manager/container_registry/base.py
index a4046703297..7fa8b921eba 100644
--- a/src/ai/backend/manager/container_registry/base.py
+++ b/src/ai/backend/manager/container_registry/base.py
@@ -292,7 +292,7 @@ async def _preprocess_manifest(
         manifest: Mapping[str, Any],
         rqst_args: Mapping[str, Any],
         image: str,
-    ) -> Mapping[str, Any]:
+    ) -> dict[str, Any]:
         """
         Extracts informations from
         [Docker iamge manifest](https://github.com/openshift/docker-distribution/blob/master/docs/spec/manifest-v2-2.md#example-image-manifest)