diff --git a/Gemfile b/Gemfile
index 521aaf1..f1a10c3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -21,4 +21,9 @@ if RUBY_VERSION >= "2.5.0"
 else
   gem "rails", "~> 5.0"
 end
-gem "mongoid", github: "mongodb/mongoid"
+
+if RUBY_VERSION >= "2.5.0"
+  gem "mongoid", github: "mongodb/mongoid"
+else
+  gem "mongoid", "~> 7.2"
+end