diff --git a/app/index.js b/app/index.js
index e36cfd4..c0b84a0 100644
--- a/app/index.js
+++ b/app/index.js
@@ -34,6 +34,9 @@ glob(globify(options, signatures), config.glob, function (err, files) {
 
   // scan each file
   files.forEach(function (file) {
+    if (fs.lstatSync(file).isDirectory()) {
+      return;
+    }
     matches = scan(file, matches, options, signatures);
   });