diff --git a/docker-compose.yml b/docker-compose.yml
index 0212415..4982400 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,6 +1,6 @@
 services:
   db:
-    image: postgres:16-alpine
+    image: postgres:18-alpine@sha256:96d56f7f57c6aacd1fcb908bc83b345ec5f83231ee486dd66a1baadce274db88
     environment:
       POSTGRES_DB: ${DB_NAME:-app}
       POSTGRES_USER: ${DB_USER:-postgres}