Gemfile in mailerlite-1.5.0 vs Gemfile in mailerlite-1.6.0

@@ -1,18 +1,18 @@
 source 'https://rubygems.org'
 
 group :development do
-  gem 'rubocop', '~> 0.53'
+  gem 'rubocop', '~> 0.57'
 end
 
 group :development, :test do
   gem 'pry'
 end
 
 group :test do
   gem 'rake' # For Travis CI
   gem 'rspec', '~> 3.7'
-  gem 'simplecov', '~> 0.15', require: false
-  gem 'webmock', '~> 3.3'
+  gem 'simplecov', '~> 0.16', require: false
+  gem 'webmock', '~> 3.4'
 end
 
 gemspec