diff --git a/app/matrix/lib/synapse/homeserver-secrets.yaml b/app/matrix/lib/synapse/homeserver-secrets.yaml
index 1f6221f..c7af6f3 100644
--- a/app/matrix/lib/synapse/homeserver-secrets.yaml
+++ b/app/matrix/lib/synapse/homeserver-secrets.yaml
@@ -6,6 +6,7 @@
 ## Database ##
 database:
   name: "psycopg2"
+  allow_unsafe_locale: true
   args:
     user: "synapse"
     password: "$(POSTGRES_PASSWORD)"