diff --git a/start.sh b/start.sh
index 18e1322..1496361 100755
--- a/start.sh
+++ b/start.sh
@@ -1,5 +1,6 @@
 #!/bin/sh
+set -eux
 echo "Push to branch $BRANCH";
 
-header=$(echo -n "ad-m:$INPUT_REPO_TOKEN" | base64)
+header=$(echo -n "ad-m:${INPUT_REPO-TOKEN}" | base64)
 git -c http.extraheader="AUTHORIZATION: basic $header" push origin refs/remotes/origin/master:master;
\ No newline at end of file