diff --git a/www/common/outer/upload.js b/www/common/outer/upload.js
index cd0f9b134..9cb19f18b 100644
--- a/www/common/outer/upload.js
+++ b/www/common/outer/upload.js
@@ -65,6 +65,7 @@ define([
                 if (box) {
                     actual += box.length;
                     var progressValue = (actual / estimate * 100);
+                    progressValue = Math.min(progressValue, 100);
                     updateProgress(progressValue);
 
                     return void sendChunk(box, function (e) {