diff --git a/alaka-defaults.yml b/alaka-defaults.yml
index b5a6723..75d6dcf 100644
--- a/alaka-defaults.yml
+++ b/alaka-defaults.yml
@@ -80,7 +80,7 @@ wordpress:
 matrix-synapse:
   env:
     ENCRYPTED_BY_DEFAULT: off
-    TURN_URIS: "[{{turn_url}}]"
+    TURN_URIS: '[{{turn_url}}]'
     RETENTION_MAX_LIFETIME: 2y
     ALLOWED_LIFETIME_MAX: 2y
   uncomment: