diff --git a/clusters/cherry/apps/cert-manager.yaml b/clusters/cherry/apps/cert-manager.yaml
index 57e10b9..4de7ef2 100644
--- a/clusters/cherry/apps/cert-manager.yaml
+++ b/clusters/cherry/apps/cert-manager.yaml
@@ -22,3 +22,8 @@ spec:
       releaseName: cert-manager
       valuesObject:
         installCRDs: true
+        strategy:
+          type: RollingUpdate
+          rollingUpdate:
+            maxSurge: 1
+            maxUnavailable: 0