diff --git a/Gemfile b/Gemfile
index 37f111c..11febb9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ gemspec
 
 group :test do
   gem 'activerecord', '>= 5.2'
-  gem 'actionmailer', '>= 5.2'
+  gem 'actionmailer', '>= 7.0.8.7'
   gem 'bson_ext', '~> 1.3'
   gem 'sqlite3', '~> 1.4'