diff --git a/.ruby-version b/.ruby-version
index 55bc9834c3b6c6b9d99cba20e1405651027fe353..951d42f2123cf08a6e8f9b65496ddbceba109c95 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-ruby-2.4.1
+ruby-2.4.2
diff --git a/Gemfile b/Gemfile
index 7946a66b9af442a4dbb99b7537d0e17202758118..55300ee2ccff77580ece298feb1ef6fe9325d564 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
-ruby '2.4.1'
+ruby '2.4.2'
 
 gem 'activesupport'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index f7a24708956c4237e52f99fd77b758e2a4a5c3e2..a29acf80f8c30b39da648009a3d99d40039a282e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -120,7 +120,7 @@ DEPENDENCIES
   webmock
 
 RUBY VERSION
-   ruby 2.4.1p111
+   ruby 2.4.2p198
 
 BUNDLED WITH
-   1.15.1
+   1.16.0