diff --git a/Gemfile b/Gemfile
index 7cf1b06..bf02765 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'puma', '~> 6.2'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3', '~> 1.6.2'
 
-gem 'mysql2', '~> 0.5.2', group: :production
+gem 'mysql2', '~> 0.5.5', group: :production
 
 gem 'bootsnap', require: false
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 3a46ee9..f5e5307 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -161,7 +161,7 @@ GEM
     multi_json (1.15.0)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
-    mysql2 (0.5.3)
+    mysql2 (0.5.5)
     net-imap (0.2.3)
       digest
       net-protocol
@@ -321,7 +321,7 @@ DEPENDENCIES
   jbuilder (~> 2.11.3)
   jquery-rails (~> 4.5.1)
   listen (~> 3.7.0)
-  mysql2 (~> 0.5.2)
+  mysql2 (~> 0.5.5)
   omniauth
   omniauth-github
   omniauth-rails_csrf_protection