diff --git a/docker-compose.yml b/docker-compose.yml
index 0212415..0dea3c3 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,6 +1,6 @@
 services:
   db:
-    image: postgres:16-alpine
+    image: postgres:18-alpine@sha256:9a8afca54e7861fd90fab5fdf4c42477a6b1cb7d293595148e674e0a3181de15
     environment:
       POSTGRES_DB: ${DB_NAME:-app}
       POSTGRES_USER: ${DB_USER:-postgres}