diff --git a/compose.yml b/compose.yml
index 41dc4d1..4bf3127 100644
--- a/compose.yml
+++ b/compose.yml
@@ -3,7 +3,7 @@ version: "3.8"
 
 x-environment:
   &default-env:
-    - CACHE_URL=redis://cache:6379/0
+    - CACHE_URL="redis://cache:6379/0"
     - CELERYD_CONCURRENCY
     - C_FORCE_ROOT=true
     - DATABASE_PASSWORD_FILE=/run/secrets/db_password