diff --git a/server/build/webpack.js b/server/build/webpack.js
index 3052e431..6d268ad1 100644
--- a/server/build/webpack.js
+++ b/server/build/webpack.js
@@ -79,7 +79,7 @@ function externalsConfig (dir, isServer) {
         return callback()
       }
 
-      if (res.match(/node_modules[/\\].*\.js/)) {
+      if (res.match(/node_modules[/\\].*\.js$/)) {
         return callback(null, `commonjs ${request}`)
       }