diff --git a/.lighthouse/jenkins-x/pullrequest.yaml b/.lighthouse/jenkins-x/pullrequest.yaml
index aa9c6454e..ea9474b36 100755
--- a/.lighthouse/jenkins-x/pullrequest.yaml
+++ b/.lighthouse/jenkins-x/pullrequest.yaml
@@ -29,7 +29,7 @@ spec:
           image: ghcr.io/distroless/busybox
           script: |
             #!/bin/sh
-            chmod u-w /tekton/home/.git-credentials
+            chattr +i /tekton/home/.git-credentials
         - name: build-make-test
           resources: {}
         - name: test-credentials2