diff --git a/mongoid-enum.gemspec b/mongoid-enum.gemspec
index bd9465d..68c3c1d 100644
--- a/mongoid-enum.gemspec
+++ b/mongoid-enum.gemspec
@@ -18,11 +18,11 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.add_runtime_dependency "mongoid", "~> 5.0"
+  spec.add_runtime_dependency "mongoid", "~> 8.0"
 
-  spec.add_development_dependency "bundler", "~> 1.3"
+  spec.add_development_dependency "bundler", "~> 2.3"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "rspec", "~> 3.1"
   spec.add_development_dependency "guard-rspec", "~> 4.6.2"
-  spec.add_development_dependency "mongoid-rspec", "~> 3.0"
+  spec.add_development_dependency "mongoid-rspec", "~> 4.1"
 end