diff --git a/.github/workflows/js.yml b/.github/workflows/js.yml
index a756a56d9..1b72549ef 100644
--- a/.github/workflows/js.yml
+++ b/.github/workflows/js.yml
@@ -157,7 +157,7 @@ jobs:
         code=$?
         if [ $code -eq 0 ]; then
           deploymentUrl=`cat deployment-url.txt`
-          safeBranch=$(echo $BRANCH_NAME | sed 's/[^a-zA-Z0-9_-]/_/g')
+          safeBranch=$(echo $BRANCH_NAME | sed 's/[^a-zA-Z0-9-]/-/g')
           aliasUrl="instant-www-js-$safeBranch-jsv.vercel.app"
           echo "ALIAS_URL=$aliasUrl" >> $GITHUB_ENV
           echo "aiasing $deploymentUrl to $aliasUrl"