diff --git a/Gemfile.lock b/Gemfile.lock
index 409d1f5..51ea3c8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -102,7 +102,7 @@ GEM
       rack (> 1, < 3)
     thor (0.20.0)
     titlecase (0.1.1)
-    uglifier (3.2.0)
+    uglifier (4.1.10)
       execjs (>= 0.3.0, < 3)
 
 PLATFORMS