diff --git a/lib/asteroid.js b/lib/asteroid.js
index e0d19243..67498417 100644
--- a/lib/asteroid.js
+++ b/lib/asteroid.js
@@ -63,9 +63,14 @@ for (var key in express) {
  * for example `asteroid.configure` etc.
  */
 
-fs.readdirSync(path.join(__dirname, 'middleware')).forEach(function (m) {
-  asteroid[m.replace(/\.js$/, '')] = require('./middleware/' + m);
-});
+fs
+  .readdirSync(path.join(__dirname, 'middleware'))
+  .filter(function (file) {
+    return file.match(/\.js$/);
+  })
+  .forEach(function (m) {
+    asteroid[m.replace(/\.js$/, '')] = require('./middleware/' + m);
+  });
 
 /**
  * Error handler title