diff --git a/apps/production/custom-configs/synapse-values.yaml b/apps/production/custom-configs/synapse-values.yaml
index 2fed9e3..a490274 100644
--- a/apps/production/custom-configs/synapse-values.yaml
+++ b/apps/production/custom-configs/synapse-values.yaml
@@ -48,7 +48,7 @@ data:
             redaction_retention_period: 7d
             forgotten_room_retention_period: 28d
             user_ips_max_age: 90d
-        auto-join-rooms:
+        auto_join:
           config: |
             auto_join_rooms:
               - "!NkFTshKWJMgdTqTbTh:axion1337.chat"