diff --git a/wiki/postgres.yaml b/wiki/postgres.yaml
index 4652946..10cb760 100644
--- a/wiki/postgres.yaml
+++ b/wiki/postgres.yaml
@@ -19,7 +19,7 @@ spec:
     spec:
       containers:
       - name: postgres
-        image: mirror.gcr.io/library/postgres:15
+        image: mirror.gcr.io/library/postgres:18
         imagePullPolicy: Always
         env:
         - name: POSTGRES_APPUSER