diff --git a/docker-compose.yml b/docker-compose.yml
index 1fb5248..c989629 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -11,7 +11,7 @@ services:
       - db
   db:
     container_name: rustbot-database
-    image: postgres:16.4-alpine3.20
+    image: postgres:16.4-alpine3.20@sha256:492898505cb45f9835acc327e98711eaa9298ed804e0bb36f29e08394229550d
     restart: unless-stopped
     ports:
       - 37931:5432/tcp