diff --git a/Gemfile.lock b/Gemfile.lock
index f8520cfc..358c6ffe 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -291,7 +291,7 @@ GEM
     tilt (2.0.8)
     tzinfo (1.2.7)
       thread_safe (~> 0.1)
-    uglifier (4.1.18)
+    uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     unicode_utils (1.4.0)
     warden (1.2.8)