diff --git a/Gemfile b/Gemfile
index 3cf4864..487d88b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -17,7 +17,7 @@
 
 source 'https://rubygems.org'
 
-ruby '2.3.3'
+ruby '2.6.3'
 
 gem 'simplecov', group: :test
 
diff --git a/create_api_gem.gemspec b/create_api_gem.gemspec
index 7e98357..caa0c69 100644
--- a/create_api_gem.gemspec
+++ b/create_api_gem.gemspec
@@ -44,8 +44,8 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.add_development_dependency 'bundler', '~> 1.14'
-  spec.add_development_dependency 'rake', '~> 10.0'
+  spec.add_development_dependency 'bundler', '~> 2.0.1'
+  spec.add_development_dependency 'rake', '~> 12.3.2'
   spec.add_development_dependency 'minitest'
   spec.add_development_dependency 'rubocop'