diff --git a/script/prepare-release.js b/script/prepare-release.js
index 8244e87ec555..dff1412a35e4 100755
--- a/script/prepare-release.js
+++ b/script/prepare-release.js
@@ -250,7 +250,7 @@ async function promptForVersion (version) {
 
 // function to determine if there have been commits to master since the last release
 async function changesToRelease () {
-  let lastCommitWasRelease = new RegExp(`Bump v[0-9.]*(-beta[0-9.]*)?(-nightly[0-9.]*)?`, 'g')
+  let lastCommitWasRelease = new RegExp(`^Bump v[0-9.]*(-beta[0-9.]*)?(-nightly[0-9.]*)?$`, 'g')
   let lastCommit = await GitProcess.exec(['log', '-n', '1', `--pretty=format:'%s'`], gitDir)
   return !lastCommitWasRelease.test(lastCommit.stdout)
 }