diff --git a/compose.yaml b/compose.yaml
index 7db390c7..1f3987f3 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -33,10 +33,10 @@ services:
         bench set-config -g redis_socketio "redis://$$REDIS_QUEUE";
         bench set-config -gp socketio_port $$SOCKETIO_PORT;
     environment:
-      DB_HOST: ${DB_HOST}
-      DB_PORT: ${DB_PORT}
-      REDIS_CACHE: ${REDIS_CACHE}
-      REDIS_QUEUE: ${REDIS_QUEUE}
+      DB_HOST: ${DB_HOST:-}
+      DB_PORT: ${DB_PORT:-}
+      REDIS_CACHE: ${REDIS_CACHE:-}
+      REDIS_QUEUE: ${REDIS_QUEUE:-}
       SOCKETIO_PORT: 9000
     depends_on: {}