diff --git a/adaptor.gemspec b/adaptor.gemspec
index 68ea955..5dd357a 100644
--- a/adaptor.gemspec
+++ b/adaptor.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.add_development_dependency 'coveralls', '~> 0.8'
-  spec.add_development_dependency 'bundler', '~> 1.16'
+  spec.add_development_dependency 'bundler', '~> 2.2'
   spec.add_development_dependency 'rake', '~> 10.0'
   spec.add_development_dependency 'rspec', '~> 3.0'
   spec.add_development_dependency 'rubocop', '~> 0.52'