diff --git a/js_rails_routes.gemspec b/js_rails_routes.gemspec
index 4532098..ed6402e 100644
--- a/js_rails_routes.gemspec
+++ b/js_rails_routes.gemspec
@@ -23,6 +23,6 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rspec', '~> 3.8'
   spec.add_development_dependency 'rubocop', '~> 1.27.0'
   spec.add_development_dependency 'rubocop-rspec', '~> 2.0'
-  spec.add_development_dependency 'simplecov', '~> 0.16.1', '!= 0.18.0', '!= 0.18.1', '!= 0.18.2', '!= 0.18.3', '!= 0.18.4', '!= 0.18.5', '!= 0.19.0', '!= 0.19.1' # rubocop:disable Metrics/LineLength
+  spec.add_development_dependency 'simplecov', '!= 0.18.0', '!= 0.18.1', '!= 0.18.2', '!= 0.18.3', '!= 0.18.4', '!= 0.18.5', '!= 0.19.0', '!= 0.19.1', '~> 0.22.0' # rubocop:disable Metrics/LineLength
   spec.metadata['rubygems_mfa_required'] = 'true'
 end