diff --git a/lib/gui/app.js b/lib/gui/app.js
index 858c86e3..e4a8568d 100644
--- a/lib/gui/app.js
+++ b/lib/gui/app.js
@@ -21,6 +21,7 @@
 'use strict';
 
 var angular = require('angular');
+const path = require('path');
 const _ = require('lodash');
 
 const app = angular.module('Etcher', [
@@ -188,6 +189,13 @@ app.controller('AppController', function(
   document.querySelector('body').style.display = 'initial';
 
   this.selectImage = function(image) {
+    const extension = path.extname(image.path).slice(1);
+
+    if (!_.includes(SupportedFormatsModel.getAllExtensions(), extension)) {
+      AnalyticsService.logEvent('Invalid image', image);
+      return;
+    }
+
     self.selection.setImage(image);
     AnalyticsService.logEvent('Select image', image);
   };