diff --git a/backend/postgres/compose.yml b/backend/postgres/compose.yml
index 7918fa9..1fc2af2 100644
--- a/backend/postgres/compose.yml
+++ b/backend/postgres/compose.yml
@@ -9,7 +9,7 @@ services:
       start_period: 20s
       test:
       - CMD-SHELL
-      - pg_isready -U $${POSTGRES_USER_FILE}
+      - pg_isready -U "$$(cat /run/secrets/POSTGRES_USER)"
       timeout: 5s
     env_file:
       - .env