diff --git a/Gemfile b/Gemfile
index 9f7d81dae..60c06e4a7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -44,7 +44,7 @@ gem "sidekiq-cron", "1.1.0"
 
 # Compression
 
-gem "uglifier", "4.1.19"
+gem "uglifier", "4.1.20"
 
 # Configuration
 
diff --git a/Gemfile.lock b/Gemfile.lock
index f5a751538..573aafc21 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -721,7 +721,7 @@ GEM
       ethon (>= 0.9.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (4.1.19)
+    uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)
     unf (0.1.4)
       unf_ext
@@ -899,7 +899,7 @@ DEPENDENCIES
   twitter (= 6.2.0)
   twitter-text (= 1.14.7)
   typhoeus (= 1.3.1)
-  uglifier (= 4.1.19)
+  uglifier (= 4.1.20)
   unicorn (= 5.5.0)
   unicorn-worker-killer (= 0.4.4)
   uuid (= 2.3.9)