diff --git a/Gemfile.lock b/Gemfile.lock
index 2cb0f5c60..837af39e1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -568,7 +568,7 @@ GEM
     trollop (2.1.2)
     tzinfo (1.2.8)
       thread_safe (~> 0.1)
-    uglifier (3.2.0)
+    uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     unf (0.1.4)
       unf_ext