diff --git a/Gruntfile.js b/Gruntfile.js
index 49d7f69..d5dea04 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -50,7 +50,7 @@ function logVersionsError (err, requiredNodeVersions, requiredNpmVersions) {
 
 function getTargetDiff () {
   var target = require('child_process').execSync('(git diff --name-only --relative || true;' +
-                                                 'git diff origin/master.. --name-only --relative || true;)' +
+                                                 'git diff origin/main.. --name-only --relative || true;)' +
                                                  '| grep \'\\.js\\?$\' || true').toString();
   if (target.length === 0) {
     target = ['.'];