diff --git a/helm-charts/proxy-k8s-argo-cd/values.yaml b/helm-charts/proxy-k8s-argo-cd/values.yaml
index 50f8318b5..f04dec95e 100644
--- a/helm-charts/proxy-k8s-argo-cd/values.yaml
+++ b/helm-charts/proxy-k8s-argo-cd/values.yaml
@@ -22,6 +22,11 @@ argocd:
           path: proxy-kubernetes/argocd-apps
           repoURL: https://github.com/GiganticMinecraft/seichi_infra
           targetRevision: HEAD
+        syncPolicy:
+          automated:
+            prune: true
+          syncOptions:
+            - CreateNamespace=true
 
     additionalProjects:
       - name: argocd