diff --git a/manifests/_apps/certmanager_chart.yaml b/manifests/_apps/certmanager_chart.yaml
index b92b101..46c4a0a 100644
--- a/manifests/_apps/certmanager_chart.yaml
+++ b/manifests/_apps/certmanager_chart.yaml
@@ -35,7 +35,7 @@ spec:
     name: cluster-fun (v2)
   source:
     repoURL: 'https://charts.jetstack.io'
-    targetRevision: v1.20.3
+    targetRevision: v1.21.0
     chart: cert-manager
     helm:
       version: v3