diff --git a/argocd/applications/grafana.yaml b/argocd/applications/grafana.yaml
index 02b7517..b7922ad 100644
--- a/argocd/applications/grafana.yaml
+++ b/argocd/applications/grafana.yaml
@@ -11,3 +11,6 @@ spec:
     path: grafana
     repoURL: https://git.pyrocufflink.blue/infra/kubernetes.git
     targetRevision: master
+  syncPolicy:
+    automated:
+      prune: true