diff --git a/Gemfile.lock b/Gemfile.lock
index 0bb3c3ee..5be65df4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -405,7 +405,7 @@ GEM
       railties (>= 3.1.1)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (4.1.17)
+    uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.3.0)
     uniform_notifier (1.11.0)