diff --git a/Gemfile b/Gemfile
index 6288c36ba..82f42b186 100644
--- a/Gemfile
+++ b/Gemfile
@@ -105,7 +105,7 @@ group :development do
   gem "rubocop-rails", "~> 2.23.1", require: false
   gem "rubocop-rspec", "~> 2.27.0", require: false
   gem "rvm1-capistrano3", "~> 1.4.0", require: false
-  gem "spring", "~> 4.1.3"
+  gem "spring", "~> 4.2.1"
   gem "web-console", "~> 4.2.1"
 end
 
diff --git a/Gemfile.lock b/Gemfile.lock
index d61b62f4d..b3cb05d3d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -618,7 +618,7 @@ GEM
       version_gem (~> 1.1, >= 1.1.1)
     social-share-button (1.2.4)
       coffee-rails
-    spring (4.1.3)
+    spring (4.2.1)
     sprockets (4.2.1)
       concurrent-ruby (~> 1.0)
       rack (>= 2.2.4, < 4)
@@ -777,7 +777,7 @@ DEPENDENCIES
   simplecov-lcov (~> 0.8.0)
   sitemap_generator (~> 6.3.0)
   social-share-button (~> 1.2.4)
-  spring (~> 4.1.3)
+  spring (~> 4.2.1)
   sprockets (~> 4.2.1)
   sprockets-rails (~> 3.4.2)
   turbolinks (~> 5.2.1)