1 files changed, 10 insertions, 6 deletions
diff --git a/synapse/storage/data_stores/main/registration.py b/synapse/storage/data_stores/main/registration.py
index 49306642ed..3e53c8568a 100644
--- a/synapse/storage/data_stores/main/registration.py
+++ b/synapse/storage/data_stores/main/registration.py
@@ -301,12 +301,16 @@ class RegistrationWorkerStore(SQLBaseStore):
             admin (bool): true iff the user is to be a server admin,
                 false otherwise.
         """
-        return self.db.simple_update_one(
-            table="users",
-            keyvalues={"name": user.to_string()},
-            updatevalues={"admin": 1 if admin else 0},
-            desc="set_server_admin",
-        )
+
+        def set_server_admin_txn(txn):
+            self.db.simple_update_one_txn(
+                txn, "users", {"name": user.to_string()}, {"admin": 1 if admin else 0}
+            )
+            self._invalidate_cache_and_stream(
+                txn, self.get_user_by_id, (user.to_string(),)
+            )
+
+        return self.db.runInteraction("set_server_admin", set_server_admin_txn)
 
     def _query_for_auth(self, txn, token):
         sql = (