diff --git a/packages/@vuepress/core/lib/node/loadConfig.js b/packages/@vuepress/core/lib/node/loadConfig.js
index c786e88d44..ec8b5f8459 100644
--- a/packages/@vuepress/core/lib/node/loadConfig.js
+++ b/packages/@vuepress/core/lib/node/loadConfig.js
@@ -14,6 +14,7 @@ const tomlParser = require('toml')
 
 module.exports = function loadConfig (vuepressDir, bustCache = true) {
   const configPath = path.resolve(vuepressDir, 'config.js')
+  const configCjsPath = path.resolve(vuepressDir, 'config.cjs')
   const configYmlPath = path.resolve(vuepressDir, 'config.yml')
   const configTomlPath = path.resolve(vuepressDir, 'config.toml')
 
@@ -29,6 +30,8 @@ module.exports = function loadConfig (vuepressDir, bustCache = true) {
     siteConfig = parseConfig(configTomlPath)
   } else if (fs.existsSync(configPath)) {
     siteConfig = require(configPath)
+  } else if (fs.existsSync(configCjsPath)) {
+    siteConfig = require(configCjsPath)
   }
 
   return siteConfig