diff --git a/README.md b/README.md
index 39002d69..6f4803bf 100644
--- a/README.md
+++ b/README.md
@@ -135,12 +135,13 @@ kubectl --kubeconfig=./kubeconfig create secret generic sops-gpg \
     --from-file=sops.asc=/dev/stdin
 ```
 
-3. Update files using `envsubst` or by updating them manually
+3. Update files using `envsubst` or by updating the files listed below manually
 
 ```sh
 export BOOTSTRAP_GITHUB_REPOSITORY="k8s-at-home/home-cluster"
 export BOOTSTRAP_METALLB_LB_RANGE="169.254.1.10-169.254.1.20"
 export BOOTSTRAP_DOMAIN="k8s-at-home.com"
+export BOOTSTRAP_DOMAIN_CERT="k8s-at-home"
 export BOOTSTRAP_CLOUDFLARE_TOKEN="dsKq41iLAbXE37GV"
 
 envsubst < ./.sops.yaml
diff --git a/cluster/apps/kustomization.yaml b/cluster/apps/kustomization.yaml
new file mode 100644
index 00000000..997c4ed9
--- /dev/null
+++ b/cluster/apps/kustomization.yaml
@@ -0,0 +1,4 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+- networking
diff --git a/cluster/apps/networking/kustomization.yaml b/cluster/apps/networking/kustomization.yaml
new file mode 100644
index 00000000..05fba57c
--- /dev/null
+++ b/cluster/apps/networking/kustomization.yaml
@@ -0,0 +1,4 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+- wildcard-certificate
diff --git a/cluster/apps/networking/wildcard-certificate/certificate.yaml b/cluster/apps/networking/wildcard-certificate/certificate.yaml
new file mode 100644
index 00000000..d1de4478
--- /dev/null
+++ b/cluster/apps/networking/wildcard-certificate/certificate.yaml
@@ -0,0 +1,15 @@
+---
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: "${SECRET_DOMAIN_CERT}"
+  namespace: networking
+spec:
+  secretName: "${SECRET_DOMAIN_CERT}-tls"
+  issuerRef:
+    name: letsencrypt-production
+    kind: ClusterIssuer
+  commonName: "${SECRET_DOMAIN}"
+  dnsNames:
+  - "${SECRET_DOMAIN}"
+  - "*.${SECRET_DOMAIN}"
diff --git a/cluster/apps/networking/wildcard-certificate/kustomization.yaml b/cluster/apps/networking/wildcard-certificate/kustomization.yaml
new file mode 100644
index 00000000..f1aec46e
--- /dev/null
+++ b/cluster/apps/networking/wildcard-certificate/kustomization.yaml
@@ -0,0 +1,4 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+- certificate.yaml
\ No newline at end of file
diff --git a/cluster/base/cluster-secrets.yaml b/cluster/base/cluster-secrets.yaml
index 2ea1b1a5..fd587af6 100644
--- a/cluster/base/cluster-secrets.yaml
+++ b/cluster/base/cluster-secrets.yaml
@@ -6,4 +6,5 @@ metadata:
     namespace: flux-system
 stringData:
     SECRET_DOMAIN: $BOOTSTRAP_DOMAIN
+    SECRET_DOMAIN_CERT: $BOOTSTRAP_DOMAIN_CERT
     SECRET_CLOUDFLARE_EMAIL: $BOOTSTRAP_CLOUDFLARE_EMAIL