diff --git a/Gemfile b/Gemfile
index 4087a27..c2534e2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -45,6 +45,6 @@ gem 'sentry-raven', '3.1.2'
 gem 'simplecov', '0.22.0'
 gem 'sinatra', '3.0.6'
 gem 'sinatra-contrib', '3.0.6'
-gem 'sprockets', '4.2.0'
+gem 'sprockets', '4.2.1'
 gem 'test-unit', '3.6.1', require: false
 gem 'xcop', '0.7.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index b328d6e..7002612 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -185,7 +185,7 @@ GEM
     snaky_hash (2.0.1)
       hashie
       version_gem (~> 1.1, >= 1.1.1)
-    sprockets (4.2.0)
+    sprockets (4.2.1)
       concurrent-ruby (~> 1.0)
       rack (>= 2.2.4, < 4)
     temple (0.10.2)
@@ -238,7 +238,7 @@ DEPENDENCIES
   simplecov (= 0.22.0)
   sinatra (= 3.0.6)
   sinatra-contrib (= 3.0.6)
-  sprockets (= 4.2.0)
+  sprockets (= 4.2.1)
   test-unit (= 3.6.1)
   xcop (= 0.7.1)