diff --git a/dependencies.sh b/dependencies.sh
index b1adb86..c08c309 100644
--- a/dependencies.sh
+++ b/dependencies.sh
@@ -34,9 +34,13 @@ sum=$(( $sum + $? ))
 
 if [[ $1 != *"victoire/victoire"* ]]; then
     revision=$(cd ../../../ && git rev-parse HEAD)
-    url="https://api.github.com/repos/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME/pulls/$CIRCLE_PR_NUMBER";
-    branch=$(curl -s -H "Authorization: token $GITHUB_TOKEN" "$url" | jq '.head.ref' | tr -d '""')
 
+    url="https://api.github.com/repos/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME/pulls/$CIRCLE_PR_NUMBER";
+    if [ -z "${GITHUB_TOKEN}" ]; then
+        branch=$(curl -s "$url" | jq -r '.head.ref')
+    else
+        branch=$(curl -s -H "Authorization: token $GITHUB_TOKEN" "$url" | jq '.head.ref' | tr -d '""')
+    fi
     # https://stackoverflow.com/questions/584894/environment-variable-substitution-in-sed
     # Manage varenv in sed
     sed -i 's@"name": "victoire/victoire",@"name": "victoire/victoire","repositories": [{"type": "vcs", "url": "https://github.com/'"${CIRCLE_PR_USERNAME}"'/'"${CIRCLE_PR_REPONAME}"'"}],@' composer.json