diff --git a/packages/@vuepress/core/lib/node/webpack/createBaseConfig.js b/packages/@vuepress/core/lib/node/webpack/createBaseConfig.js
index d817960b74..13c30b679e 100644
--- a/packages/@vuepress/core/lib/node/webpack/createBaseConfig.js
+++ b/packages/@vuepress/core/lib/node/webpack/createBaseConfig.js
@@ -149,7 +149,7 @@ module.exports = function createBaseConfig (context, isServer) {
           // i.e.
           // @vuepress/*
           // vuepress-*
-          if (/(@vuepress\/[^\/]*|vuepress-[^\/]*)\/(?!node_modules).*\.js$/.test(filePath)) {
+          if (/(@vuepress[\/\\][^\/\\]*|vuepress-[^\/\\]*)[\/\\](?!node_modules).*\.js$/.test(filePath)) {
             return false
           }
           // Don't transpile node_modules