diff --git a/restpack_serializer.gemspec b/restpack_serializer.gemspec
index 139ba34..0b0db1a 100644
--- a/restpack_serializer.gemspec
+++ b/restpack_serializer.gemspec
@@ -20,6 +20,7 @@ Gem::Specification.new do |gem|
   gem.add_dependency 'activesupport', ['>= 4.0.3', '< 6.0']
   gem.add_dependency 'activerecord', ['>= 4.0.3', '< 6.0']
   gem.add_dependency 'kaminari', '~> 0.17.0'
+  gem.add_dependency 'kaminari-mongoid', '~> 0.1'
 
   gem.add_development_dependency 'restpack_gem', '~> 0.0.9'
   gem.add_development_dependency 'rake', '~> 11.3'