diff --git a/cluster/cert-manager-appset.yaml b/cluster/cert-manager-appset.yaml
index 323c70e..390655b 100644
--- a/cluster/cert-manager-appset.yaml
+++ b/cluster/cert-manager-appset.yaml
@@ -27,7 +27,7 @@ spec:
         targetRevision: HEAD
         helm:
           valueFiles:
-            - values-'{{.name}}'.yaml
+            - values-{{.name}}.yaml
       syncPolicy:
         automated:
           prune: true