diff --git a/pactas_itero.gemspec b/pactas_itero.gemspec
index 54f9d1e..16b558f 100644
--- a/pactas_itero.gemspec
+++ b/pactas_itero.gemspec
@@ -42,7 +42,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency("rubocop-performance", "~> 1.13.2")
   spec.add_development_dependency("rubocop-rake")
   spec.add_development_dependency("rubocop-rspec")
-  spec.add_development_dependency("simplecov", "~> 0.16.1")
+  spec.add_development_dependency("simplecov", "~> 0.21.2")
   spec.add_development_dependency("webmock", "~> 3.3")
   spec.metadata["rubygems_mfa_required"] = "true"
 end