diff --git a/cert-manager/base/kustomization.yaml b/cert-manager/base/kustomization.yaml
deleted file mode 100644
index ee014cc..0000000
--- a/cert-manager/base/kustomization.yaml
+++ /dev/null
@@ -1,6 +0,0 @@
-apiVersion: kustomize.config.k8s.io/v1beta1
-kind: Kustomization
-
-namespace: cert-manager
-resources:
-- https://github.com/cert-manager/cert-manager/releases/download/v1.16.1/cert-manager.yaml
diff --git a/cert-manager/cluster-issuer.yaml b/cert-manager/cluster-issuer.yaml
new file mode 100644
index 0000000..8b2776d
--- /dev/null
+++ b/cert-manager/cluster-issuer.yaml
@@ -0,0 +1,20 @@
+apiVersion: cert-manager.io/v1
+kind: ClusterIssuer
+metadata:
+  name: letsencrypt
+  namespace: kube-system
+spec:
+  acme:
+    # You must replace this email address with your own.
+    # Let's Encrypt will use this to contact you about expiring
+    # certificates, and issues related to your account.
+    email: drive@sunet.se
+    server: https://acme-v02.api.letsencrypt.org/directory
+    privateKeySecretRef:
+      # Secret resource that will be used to store the account's private key.
+      name: letsencrypt-account-key
+    # Add a single challenge solver, HTTP01 using nginx
+    solvers:
+    - http01:
+        ingress:
+          class: public
diff --git a/cert-manager/overlays/test/kustomization.yaml b/cert-manager/overlays/test/kustomization.yaml
deleted file mode 100644
index 4e4f197..0000000
--- a/cert-manager/overlays/test/kustomization.yaml
+++ /dev/null
@@ -1,4 +0,0 @@
-apiVersion: kustomize.config.k8s.io/v1beta1
-kind: Kustomization
-resources:
-- ../../base