diff --git a/Gemfile.lock b/Gemfile.lock
index f0b2fcf..288c1a0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -136,7 +136,7 @@ GEM
     titlecase (0.1.1)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (4.1.19)
+    uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)
 
 PLATFORMS