diff --git a/kubernetes/flux/config/flux.yaml b/kubernetes/flux/config/flux.yaml
index f3b65f5a..dd64c96f 100644
--- a/kubernetes/flux/config/flux.yaml
+++ b/kubernetes/flux/config/flux.yaml
@@ -8,7 +8,7 @@ spec:
   interval: 10m
   url: oci://ghcr.io/fluxcd/flux-manifests
   ref:
-    tag: v0.40.2
+    tag: v0.40.2@sha256:2dd130a1d06de2bfa7b8200eb20fd6b05da3fe2f9e58b4f1ce2c7812cdeca233
 ---
 apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
 kind: Kustomization