diff --git a/Gemfile b/Gemfile
index 1a05248be..46e299b25 100644
--- a/Gemfile
+++ b/Gemfile
@@ -62,7 +62,7 @@ gem "autoprefixer-rails", "6.3.1"
 
 ENV["DB"] ||= "mysql"
 
-gem "mysql2", "0.3.20" if ENV["DB"] == "all" || ENV["DB"] == "mysql"
+gem "mysql2", "0.4.2" if ENV["DB"] == "all" || ENV["DB"] == "mysql"
 gem "pg",     "0.18.4" if ENV["DB"] == "all" || ENV["DB"] == "postgres"
 
 gem "activerecord-import", "0.11.0"