diff --git a/Gemfile.lock b/Gemfile.lock
index 69b1249374..0fbb5d43ce 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -683,7 +683,7 @@ GEM
       railties (> 3.2.8, < 4.0.0)
       sprockets (>= 2.2.0)
     tzinfo (0.3.55)
-    uglifier (4.1.20)
+    uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.3.2)
     unicorn (5.5.1)