diff --git a/lib/handler.js b/lib/handler.js
index ffa9e80..1b2e5ea 100644
--- a/lib/handler.js
+++ b/lib/handler.js
@@ -117,7 +117,7 @@ module.exports = {
 
             const wwwDir = path.join(project_dir, 'www');
 
-            execa('npm', ['install', electronPluginSrc], {
+            execa.sync('npm', ['install', electronPluginSrc], {
                 cwd: wwwDir
             });