diff --git a/scripts/set-package-version.js b/scripts/set-package-version.js
index 06d6c6d09d2..31928e5575a 100755
--- a/scripts/set-package-version.js
+++ b/scripts/set-package-version.js
@@ -33,7 +33,7 @@ try {
     if (TRAVIS_MODE === 'netlifyPr') {
       newVersion += `-pr.${getCommitHash().substr(0, 8)}`;
     } else if (TRAVIS_MODE === 'netlifyBranch') {
-      newVersion += `-branch.${process.env.BRANCH /* set by netlify */}.${getCommitHash().substr(0, 8)}`;
+      newVersion += `-branch.${process.env.BRANCH/* set by netlify */.replace(/[^a-zA-Z0-9]/g, '-')}.${getCommitHash().substr(0, 8)}`;
     } else {
       newVersion += `-canary.${getCommitNum()}`;
     }