diff --git a/.ruby-version b/.ruby-version
index 005119b..8e8299d 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.4.1
+2.4.2
diff --git a/.tool-versions b/.tool-versions
new file mode 100644
index 0000000..dff7248
--- /dev/null
+++ b/.tool-versions
@@ -0,0 +1 @@
+ruby 2.4.2
diff --git a/Gemfile b/Gemfile
index 7342654..0622c6b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source 'http://rubygems.org'
-ruby '2.4.1'
+ruby '2.4.2'
 
 gem 'dotenv-rails', :groups => [:development, :test]
 
diff --git a/Gemfile.lock b/Gemfile.lock
index d93ae88..cdd67f8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -379,7 +379,7 @@ DEPENDENCIES
   unf
 
 RUBY VERSION
-   ruby 2.4.1p111
+   ruby 2.4.2p198
 
 BUNDLED WITH
-   1.14.6
+   1.16.0