diff --git a/patches/metrics.yaml b/patches/metrics.yaml
index f5a9567..ad3efa5 100644
--- a/patches/metrics.yaml
+++ b/patches/metrics.yaml
@@ -1,4 +1,4 @@
 machine:
   kubelet:
     extraArgs:
-      rotate-server-certificates: true
+      rotate-server-certificates: "true"