diff --git a/gemfiles/4.2.gemfile b/gemfiles/4.2.gemfile
index 9c2fb09..60a797b 100644
--- a/gemfiles/4.2.gemfile
+++ b/gemfiles/4.2.gemfile
@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 gem 'activerecord', '~> 4.2.0'
 
 group :test do
-  gem 'mysql2', '0.3.21' if %w[mysql makara_mysql].include?(ENV['DB'])
+  gem 'mysql2', '0.4.10' if %w[mysql makara_mysql].include?(ENV['DB'])
   gem 'pg', '~> 0.18' if %w[pg makara_pg].include?(ENV['DB'])
   gem 'makara', '~> 0.4.1' if %w[makara_mysql makara_pg].include?(ENV['DB'])
   gem 'simplecov', '< 0.18'
diff --git a/gemfiles/5.0.gemfile b/gemfiles/5.0.gemfile
index 0b2ec97..1965941 100644
--- a/gemfiles/5.0.gemfile
+++ b/gemfiles/5.0.gemfile
@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 gem 'activerecord', '~> 5.0.0'
 
 group :test do
-  gem 'mysql2', '0.3.21' if %w[mysql makara_mysql].include?(ENV['DB'])
+  gem 'mysql2', '0.4.10' if %w[mysql makara_mysql].include?(ENV['DB'])
   gem 'pg', '~> 0.18' if %w[pg makara_pg].include?(ENV['DB'])
   gem 'makara', '~> 0.4.1' if %w[makara_mysql makara_pg].include?(ENV['DB'])
   gem 'simplecov', '< 0.18'
diff --git a/gemfiles/5.1.gemfile b/gemfiles/5.1.gemfile
index 3f47bb7..ebb10b6 100644
--- a/gemfiles/5.1.gemfile
+++ b/gemfiles/5.1.gemfile
@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 gem 'activerecord', '~> 5.1.0'
 
 group :test do
-  gem 'mysql2', '0.3.21' if %w[mysql makara_mysql].include?(ENV['DB'])
+  gem 'mysql2', '0.4.10' if %w[mysql makara_mysql].include?(ENV['DB'])
   gem 'pg', '~> 0.18' if %w[pg makara_pg].include?(ENV['DB'])
   gem 'makara', '~> 0.4.1' if %w[makara_mysql makara_pg].include?(ENV['DB'])
   gem 'simplecov', '< 0.18'