diff --git a/Gemfile b/Gemfile
index 00ae88a8f..8a07c7f3a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ gem 'thin'
 gem 'sinatra'
 gem 'rack'
 gem 'em-websocket', '~> 0.3.6' # WebSocket support
-gem 'uglifier', '~> 2.2.1'
+gem 'uglifier'
 gem 'mime-types'