kaicho.gemspec in kaicho-0.3.0 vs kaicho.gemspec in kaicho-0.3.1

@@ -21,10 +21,10 @@
 
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.add_development_dependency 'bundler',   '~> 1.16', '>=1.16.5'
+  spec.add_development_dependency 'bundler',   '~> 2.0'
   spec.add_development_dependency 'rake',      '~> 12.3', '>=12.3.1'
   spec.add_development_dependency 'rspec',     '~> 3.8',  '>=3.8.0'
   spec.add_development_dependency 'coveralls', '~> 0.8',  '>=0.8.22'
 end