diff --git a/.github/workflows/label-on-approval.yml b/.github/workflows/label-on-approval.yml
index 565709be..af7ef639 100644
--- a/.github/workflows/label-on-approval.yml
+++ b/.github/workflows/label-on-approval.yml
@@ -1,3 +1,4 @@
+# Copied from https://github.com/Ouranosinc/xclim
 name: Label Pull Request on Pull Request review approval
 
 on: