diff --git a/script/prepare-release.js b/script/prepare-release.js
index 4ed7ded552ed..0d0d3b83d4d7 100755
--- a/script/prepare-release.js
+++ b/script/prepare-release.js
@@ -180,7 +180,7 @@ async function createRelease (branchToTarget, isBeta) {
     githubOpts.body = releaseNotes
   }
   githubOpts.tag_name = newVersion
-  githubOpts.target_commitish = branchToTarget
+  githubOpts.target_commitish = newVersion.indexOf('nightly') !== -1 ? 'master' : branchToTarget
   console.log('creating release with github opts', githubOpts)
   await github.repos.createRelease(githubOpts)
     .catch(err => {