diff --git a/app/im/config/synapse/homeserver.yaml b/app/im/config/synapse/homeserver.yaml
index 9f55e05..0dfe10d 100644
--- a/app/im/config/synapse/homeserver.yaml
+++ b/app/im/config/synapse/homeserver.yaml
@@ -83,7 +83,7 @@ listeners:
 # Database configuration
 database:
     name: psycopg2
-    allow_unsafe_locale: true
+    allow_unsafe_locale: false
     args:
         user: {{ key "secrets/chat/synapse/postgres_user" | trimSpace }}
         password: {{ key "secrets/chat/synapse/postgres_pwd" | trimSpace }}