diff --git a/class_kit.gemspec b/class_kit.gemspec
index 591dfaf..2545ad7 100644
--- a/class_kit.gemspec
+++ b/class_kit.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'pry-byebug'
   spec.add_development_dependency 'rake', '~> 10.0'
   spec.add_development_dependency 'rspec'
-  spec.add_development_dependency 'simplecov', '< 0.18.0'
+  spec.add_development_dependency 'simplecov', ' ~> 0.22.0'
   spec.add_development_dependency 'simplecov_json_formatter'
 
   spec.add_dependency 'hash_kit'
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 615c1d6..dd03461 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,4 +1,7 @@
 require 'simplecov'
+require 'simplecov_json_formatter'
+
+SimpleCov.formatter = SimpleCov::Formatter::JSONFormatter
 
 SimpleCov.start do
   add_filter 'spec/'