diff --git a/app.js b/app.js
index 0570e377ac871dd1e6cfba627c2fe8e83627eb7d..8ba1e72eb82c4b9f9c4bef899ea284a368132acf 100644
--- a/app.js
+++ b/app.js
@@ -120,7 +120,7 @@ var firmwarewizard = function() {
     return index === self.indexOf(e);
   });
 
-  var reFileExtension = new RegExp(/.(bin|img.gz|img|tar|ubi)/);
+  var reFileExtension = new RegExp(/.(bin|img\.gz|img|tar|ubi)$/);
   var reRemoveDashes = new RegExp(/-/g);
   var reSearchable = new RegExp('[-/ '+NON_BREAKING_SPACE+']', 'g');
   var reRemoveSpaces = new RegExp(/ /g);