diff --git a/k8s/infra/postgres.yaml b/k8s/infra/postgres.yaml
index 4e0d74b..4ca27c8 100644
--- a/k8s/infra/postgres.yaml
+++ b/k8s/infra/postgres.yaml
@@ -52,7 +52,7 @@ spec:
     spec:
       containers:
       - name: postgres
-        image: postgres:18.2-alpine@sha256:035b9ab53cfa147d7202b61f5f7782b939ae815b7d6bc81c96b7b42ff1fca950
+        image: postgres:18.3-alpine@sha256:eb37f58646a901dc7727cf448cae36daaefaba79de33b5058dab79aa4c04aefb
         args:
         - -c
         - shared_buffers=384MB