diff --git a/deploy.sh b/deploy.sh
index 47fae304d909e2edd8fd8476e297d2c1c5dff6eb..18b10671be582b3148e1b7a236e28abfdb250252 100755
--- a/deploy.sh
+++ b/deploy.sh
@@ -37,7 +37,7 @@ git remote set-url origin "git@gitlab.epfl.ch:idevelop/howtogitlabrunner.git"
 git push -f --tags
 echo "END OF PUSH"
 
-tee_stderr="perl -pe 'STDERR->print(\$_)'"
+tee_stderr="perl -pe 'STDERR->print(\$_);warn(\$!)'"
 
 echo "BEGIN UPLOAD"
 UPLOADED_FILE_URL="$(curl --request POST --header "Private-Token: ${MY_TOKEN}" --form "file=@README.pdf" "https://gitlab.epfl.ch/api/v4/projects/$PROJECT_ID/uploads" | $tee_stderr | jq -r .url)"