diff --git a/pactas_itero.gemspec b/pactas_itero.gemspec
index d5f5788..e41e027 100644
--- a/pactas_itero.gemspec
+++ b/pactas_itero.gemspec
@@ -32,6 +32,6 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rspec", '~> 3.8.0'
   spec.add_development_dependency("rubocop", '~> 0.68') # check houndci compatibility before updating rubocop
   spec.add_development_dependency("rubocop-performance", "~> 1.3")
-  spec.add_development_dependency("simplecov", "~> 0.16.1")
+  spec.add_development_dependency("simplecov", "~> 0.18.5")
   spec.add_development_dependency("webmock", "~> 3.3")
 end