diff --git a/Gemfile.lock b/Gemfile.lock
index 0900884..a01d167 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -318,7 +318,7 @@ GEM
     turbolinks-source (5.2.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (4.1.19)
+    uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.4.0)
     unicorn (5.4.1)