diff --git a/clusters/matrix/production-sync.yaml b/clusters/matrix/production-sync.yaml
index 4e8b92a..e699712 100644
--- a/clusters/matrix/production-sync.yaml
+++ b/clusters/matrix/production-sync.yaml
@@ -1,3 +1,4 @@
+apiVersion: kustomize.toolkit.fluxcd.io/v1
 kind: Kustomization
 metadata:
   name: production-apps