diff --git a/next_rails.gemspec b/next_rails.gemspec
index e073411..41fb0f1 100644
--- a/next_rails.gemspec
+++ b/next_rails.gemspec
@@ -26,7 +26,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "bundler", ">= 1.16", "< 3.0"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "rspec", "~> 3.0"
-  spec.add_development_dependency "simplecov", "~> 0.17.1"
+  spec.add_development_dependency "simplecov", "~> 0.22.0"
   spec.add_development_dependency "timecop", "~> 0.9.1"
   spec.add_development_dependency "byebug"
   spec.add_development_dependency "rexml", "3.1.7.3" # limited on purpose, new versions don't work with old rubies