diff --git a/public/javascripts/application.js b/public/javascripts/application.js
index 2b9d1586f..18afa7f67 100644
--- a/public/javascripts/application.js
+++ b/public/javascripts/application.js
@@ -629,7 +629,7 @@ function img_thumbnails() {
   $('.thumbnails a').colorbox({rel:'nofollow'});
   $('.attachments').find('a').each(function(index, element) {
     var href_value = $(element).attr('href');
-    if (/\.(jpg|png|gif|bmp|PNG|BMP|GIF|JPG)$/.test(href_value)) {
+    if (/\.(jpg|png|gif|bmp|jpeg|PNG|BMP|GIF|JPG|JPEG)$/.test(href_value)) {
       $(element).colorbox({rel:'nofollow'});
     }