diff --git a/.ruby-version b/.ruby-version
index 8e8299d..35cee72 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.4.2
+2.4.3
diff --git a/.tool-versions b/.tool-versions
index dff7248..5cfccd9 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-ruby 2.4.2
+ruby 2.4.3
diff --git a/Gemfile b/Gemfile
index 2bd11d3..a8ebdfc 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source "https://rubygems.org"
-ruby "2.4.2"
+ruby "2.4.3"
 
 gem "rake"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index f743d25..37482eb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -163,7 +163,7 @@ DEPENDENCIES
   uglifier
 
 RUBY VERSION
-   ruby 2.4.2p198
+   ruby 2.4.3p205
 
 BUNDLED WITH
-   1.16.1
+   1.17.3