diff --git a/Gemfile b/Gemfile
index b0f0018fc..c8745b6eb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -44,7 +44,7 @@ gem "sidekiq-cron", "0.6.3"
 
 # Compression
 
-gem "uglifier", "3.2.0"
+gem "uglifier", "4.1.8"
 
 # Configuration
 
diff --git a/Gemfile.lock b/Gemfile.lock
index b5169dce3..3aad9f133 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -716,7 +716,7 @@ GEM
       ethon (>= 0.9.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (3.2.0)
+    uglifier (4.1.8)
       execjs (>= 0.3.0, < 3)
     unf (0.1.4)
       unf_ext
@@ -899,7 +899,7 @@ DEPENDENCIES
   twitter (= 6.1.0)
   twitter-text (= 1.14.7)
   typhoeus (= 1.3.0)
-  uglifier (= 3.2.0)
+  uglifier (= 4.1.8)
   unicorn (= 5.4.0)
   unicorn-worker-killer (= 0.4.4)
   uuid (= 2.3.8)