diff --git a/infrastructure/07-certmanager/dns-issuer.yaml b/infrastructure/07-certmanager/dns-issuer.yaml
index ee5e95c..36ff4f7 100644
--- a/infrastructure/07-certmanager/dns-issuer.yaml
+++ b/infrastructure/07-certmanager/dns-issuer.yaml
@@ -15,7 +15,7 @@ spec:
     solvers:
       - dns01:
           webhook:
-            groupName: cert-manager.io
+            groupName: steffenillium.de
             solverName: ionos
             config:
               apiUrl: https://api.hosting.ionos.com/dns/v1
@@ -43,7 +43,7 @@ spec:
     solvers:
       - dns01:
           webhook:
-            groupName: cert-manager.io
+            groupName: steffenillium.de
             solverName: ionos
             config:
               apiUrl: https://api.hosting.ionos.com/dns/v1
diff --git a/infrastructure/07-certmanager/wildcard-cert.yaml b/infrastructure/07-certmanager/wildcard-cert.yaml
index 65520cc..84ac88c 100644
--- a/infrastructure/07-certmanager/wildcard-cert.yaml
+++ b/infrastructure/07-certmanager/wildcard-cert.yaml
@@ -11,6 +11,7 @@ spec:
   issuerRef:
     name: letsencrypt-staging
     kind: ClusterIssuer
+    group: steffenillium.de
 ---
 apiVersion: traefik.io/v1alpha1
 kind: TLSStore