diff --git a/config/certmanager/certificate-metrics.yaml b/config/certmanager/certificate-metrics.yaml
index 6e4c1b6a..c6e3ad15 100644
--- a/config/certmanager/certificate-metrics.yaml
+++ b/config/certmanager/certificate-metrics.yaml
@@ -18,3 +18,6 @@ spec:
     kind: Issuer
     name: selfsigned-issuer
   secretName: metrics-server-cert
+  privateKey:
+    algorithm: ECDSA
+    size: 384
diff --git a/config/certmanager/certificate-webhook.yaml b/config/certmanager/certificate-webhook.yaml
index df71eae4..7d5410f7 100644
--- a/config/certmanager/certificate-webhook.yaml
+++ b/config/certmanager/certificate-webhook.yaml
@@ -18,3 +18,6 @@ spec:
     kind: Issuer
     name: selfsigned-issuer
   secretName: webhook-server-cert
+  privateKey:
+    algorithm: ECDSA
+    size: 384