diff --git a/lib/load_api.js b/lib/load_api.js
index 172faec..92e5839 100644
--- a/lib/load_api.js
+++ b/lib/load_api.js
@@ -43,13 +43,13 @@ module.exports = app => {
         continue;
       }
 
-      if (stat.isFile() && path.extname(name) === '.js') {
+      if (stat.isFile() && ['.js', '.ts'].includes(path.extname(name))) {
         let handler = require(filepath);
         // support `module.exports = function (app) { return exports; }`
         if (typeof handler === 'function') {
           handler = handler(app);
         }
-        let objectNames = path.basename(name, '.js');
+        let objectNames = path.basename(name, path.extname(name));
         // api/sites/index.js => GET /sites
         if (level >= 1 && objectNames === 'index') {
           objectNames = path.basename(dir);