diff --git a/Installation.md b/Installation.md
index 41baebf..66eb1ac 100644
--- a/Installation.md
+++ b/Installation.md
@@ -64,7 +64,7 @@ services:
       POSTGRES_USER: kemal
       POSTGRES_PASSWORD: kemal
     healthcheck:
-      test: ["CMD", "pg_isready", "-U", "postgres"]
+      test: ["CMD-SHELL", "pg_isready -U $$POSTGRES_USER"]
   invidious:
     image: quay.io/invidious/invidious:latest
     restart: always