diff --git a/Gemfile b/Gemfile
index 09745db..c755663 100644
--- a/Gemfile
+++ b/Gemfile
@@ -43,7 +43,7 @@ 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 'telebot', '0.1.2'
 gem 'thin', '1.8.2'
 gem 'xcop', '0.7.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index fd186b3..9f4f6d9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -219,7 +219,7 @@ GEM
       sinatra (= 3.0.6)
       tilt (~> 2.0)
     slop (4.10.1)
-    sprockets (4.2.0)
+    sprockets (4.2.1)
       concurrent-ruby (~> 1.0)
       rack (>= 2.2.4, < 4)
     telebot (0.1.2)
@@ -277,7 +277,7 @@ DEPENDENCIES
   simplecov (= 0.22.0)
   sinatra (= 3.0.6)
   sinatra-contrib (= 3.0.6)
-  sprockets (= 4.2.0)
+  sprockets (= 4.2.1)
   telebot (= 0.1.2)
   thin (= 1.8.2)
   xcop (= 0.7.1)