diff --git a/k8s/core/cert-manager/kustomization.yaml b/k8s/core/cert-manager/kustomization.yaml
index beff365..4c72abf 100644
--- a/k8s/core/cert-manager/kustomization.yaml
+++ b/k8s/core/cert-manager/kustomization.yaml
@@ -10,7 +10,7 @@ resources:
 helmCharts:
   - name: cert-manager
     repo: https://charts.jetstack.io
-    version: 1.20.0
+    version: 1.21.1
     releaseName: cert-manager
     namespace: cert-manager
     valuesFile: values.yaml