diff --git a/src/js/client.js b/src/js/client.js
index df416d5dd..61565fd19 100644
--- a/src/js/client.js
+++ b/src/js/client.js
@@ -1586,7 +1586,7 @@ angular.module('Application').service('Client', ['$http', '$interval', 'md5', 'N
             }
         };
 
-        post('/api/v1/apps/' + appId + '/upload?file=/tmp/' + file.name, fd, config, function (error, data, status) {
+        post('/api/v1/apps/' + appId + '/upload?file=' + encodeURIComponent('/tmp/' + file.name), fd, config, function (error, data, status) {
             if (error) return callback(error);
             if (status !== 202) return callback(new ClientError(status, data));