diff --git a/compose.yml b/compose.yml
index 1dc8635..85da549 100644
--- a/compose.yml
+++ b/compose.yml
@@ -10,8 +10,7 @@ x-redis-env: &redis-env
   REDIS_URL: redis://redis:6379
 
 x-environment: &default-env
-  <<: *db-env
-  <<: *redis-env
+  <<: [*db-env, *redis-env]
   CANONICAL_HOST: ${DOMAIN}
   VIRTUAL_HOST: ${DOMAIN}
   CHANNELS_URI: wss://channels.${DOMAIN}