diff --git a/kustomize/certificate.yml b/kustomize/certificate.yml
new file mode 100644
index 0000000..c1cfa42
--- /dev/null
+++ b/kustomize/certificate.yml
@@ -0,0 +1,12 @@
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: argocd-app
+  namespace: argocd
+spec:
+  dnsNames:
+    - k8s-argocd.tk
+  secretName: argocd-app-tls
+  issuerRef:
+    name: letsencrypt-cluster-issuer
+    kind: ClusterIssuer