diff --git a/everything-app/app-letsencrypt.yaml b/everything-app/app-letsencrypt.yaml
index 10610f4..5e86841 100644
--- a/everything-app/app-letsencrypt.yaml
+++ b/everything-app/app-letsencrypt.yaml
@@ -11,7 +11,7 @@ spec:
   source:
     chart: cert-manager
     repoURL: https://charts.jetstack.io
-    targetRevision: v1.13.1
+    targetRevision: v1.17.1
     helm:
       parameters:
       - name: installCRDs