diff --git a/Gemfile.lock b/Gemfile.lock
index 5379122b7..b31c48cd2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -560,7 +560,7 @@ GEM
     turbolinks-source (5.2.0)
     tzinfo (1.2.7)
       thread_safe (~> 0.1)
-    uglifier (4.1.20)
+    uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     underscore-rails (1.8.3)
     unicode-display_width (1.6.0)