diff --git a/argocd/apps/mattermost/mattermnost.yaml b/argocd/apps/mattermost/mattermnost.yaml
index 23e5e9a..45103d7 100644
--- a/argocd/apps/mattermost/mattermnost.yaml
+++ b/argocd/apps/mattermost/mattermnost.yaml
@@ -25,7 +25,7 @@ spec:
             kubernetes.io/ingress.class: traefik
             traefik.ingress.kubernetes.io/router.tls: "true"
             traefik.ingress.kubernetes.io/router.middlewares: default-http-redirect@kubernetescrd
-            cert-manager.io/cluster-issuer: lets-encrypt
+            cert-manager.io/cluster-issuer: lets-encrypt-staging
         
         # Disable MySQL
         mysql: