1 files changed, 4 insertions, 0 deletions
diff --git a/synapse/handlers/profile.py b/synapse/handlers/profile.py
index e6c3cf585b..6b5a6ded8b 100644
--- a/synapse/handlers/profile.py
+++ b/synapse/handlers/profile.py
@@ -456,7 +456,11 @@ class ProfileHandler:
                 continue
 
             new_name = profile.get("displayname")
+            if not isinstance(new_name, str):
+                new_name = None
             new_avatar = profile.get("avatar_url")
+            if not isinstance(new_avatar, str):
+                new_avatar = None
 
             # We always hit update to update the last_check timestamp
             await self.store.update_remote_profile_cache(user_id, new_name, new_avatar)