diff --git a/docker-compose.yml b/docker-compose.yml
index d69874a..c1051a7 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,10 +1,13 @@
 services:
   postgres:
-    image: postgres:17-alpine
+    image: postgres:18-alpine
     environment:
       POSTGRES_USER: levyraati
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:?set POSTGRES_PASSWORD in .env}
       POSTGRES_DB: levyraati
+      # The 18 image moved its default data directory; pin it so the ./pgdata mount below
+      # is still where the database lives.
+      PGDATA: /var/lib/postgresql/data
     volumes:
       - ./pgdata:/var/lib/postgresql/data
     healthcheck: