diff --git a/webhook/kustomization.yml b/webhook/kustomization.yml
index ac4a686..03095cc 100644
--- a/webhook/kustomization.yml
+++ b/webhook/kustomization.yml
@@ -14,6 +14,6 @@ resources:
 images:
   - name: nginx-certs
     newName: registry.k8s.io/ingress-nginx/kube-webhook-certgen
-    newTag: "v1.3.0"
+    newTag: "v1.4.0"
 
 ...