diff --git a/demo/backend/server/app.py b/demo/backend/server/app.py
index 9902f475f..424e85bb5 100644
--- a/demo/backend/server/app.py
+++ b/demo/backend/server/app.py
@@ -128,6 +128,10 @@ def get_context(self, request: Request, response: Response) -> Any:
         # https://strawberry.rocks/docs/operations/deployment
         # https://strawberry.rocks/docs/integrations/flask
         allow_queries_via_get=False,
+        # Strawberry recently changed multipart request handling, which now
+        # requires enabling support explicitly for views.
+        # https://github.com/strawberry-graphql/strawberry/issues/3655
+        multipart_uploads_enabled=True,
     ),
 )