diff --git a/Gemfile b/Gemfile
index 82e47bc6..f306d2a9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gem 'rails', '5.1.5'
 
-gem 'mysql2', '~> 0.4.5'
+gem 'mysql2', '~> 0.5.0'
 gem 'sass-rails', '~> 5.0.6'
 gem 'uglifier', '~> 4.1.6'
 gem 'generic_form_builder', '~> 0.13.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 550e0a20..00aad072 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -172,7 +172,7 @@ GEM
     multi_test (0.1.2)
     multi_xml (0.6.0)
     multipart-post (2.0.0)
-    mysql2 (0.4.10)
+    mysql2 (0.5.0)
     netrc (0.11.0)
     nio4r (2.2.0)
     nokogiri (1.8.2)
@@ -344,7 +344,7 @@ DEPENDENCIES
   govuk-lint
   govuk_admin_template
   govuk_app_config (~> 1.3.2)
-  mysql2 (~> 0.4.5)
+  mysql2 (~> 0.5.0)
   plek (~> 2.1.1)
   pry-byebug
   rails (= 5.1.5)