diff --git a/vars/gitopsPromote.groovy b/vars/gitopsPromote.groovy
index d81697b..ceea4d9 100644
--- a/vars/gitopsPromote.groovy
+++ b/vars/gitopsPromote.groovy
@@ -23,7 +23,7 @@ for f in sorted(pathlib.Path(path).rglob("*.yaml")):
     for ln in lines:
         if ln.strip().startswith("image:") and (image + ":") in ln:
             indent = ln[: len(ln) - len(ln.lstrip())]
-            out.append(indent + "image: " + image + ":" + tag + "\n")
+            out.append(indent + "image: " + image + ":" + tag + chr(10))
             hit = True
         else:
             out.append(ln)