diff --git a/spark/base/spark-ui-proxy-ingress.yml b/spark/base/spark-ui-proxy-ingress.yml
index 096bc5a..4ffaf18 100644
--- a/spark/base/spark-ui-proxy-ingress.yml
+++ b/spark/base/spark-ui-proxy-ingress.yml
@@ -8,7 +8,7 @@ metadata:
     # nginx.ingress.kubernetes.io/auth-type: basic
     # nginx.ingress.kubernetes.io/auth-secret: htpasswd
     # nginx.ingress.kubernetes.io/auth-realm: Enter your credentials
-    # cert-manager.io/issuer: "letsencrypt"
+    cert-manager.io/issuer: "letsencrypt"
 spec:
   ingressClassName: nginx
   defaultBackend:
diff --git a/spark/overlays/test/spark-ui-proxy-ingress.yml b/spark/overlays/test/spark-ui-proxy-ingress.yml
index 096bc5a..4ffaf18 100644
--- a/spark/overlays/test/spark-ui-proxy-ingress.yml
+++ b/spark/overlays/test/spark-ui-proxy-ingress.yml
@@ -8,7 +8,7 @@ metadata:
     # nginx.ingress.kubernetes.io/auth-type: basic
     # nginx.ingress.kubernetes.io/auth-secret: htpasswd
     # nginx.ingress.kubernetes.io/auth-realm: Enter your credentials
-    # cert-manager.io/issuer: "letsencrypt"
+    cert-manager.io/issuer: "letsencrypt"
 spec:
   ingressClassName: nginx
   defaultBackend: