diff --git a/skylight.gemspec b/skylight.gemspec
index 04d1c32b..7448716b 100644
--- a/skylight.gemspec
+++ b/skylight.gemspec
@@ -38,7 +38,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rspec", "~> 3.7"
   spec.add_development_dependency "rspec-collection_matchers", "~> 1.1"
   spec.add_development_dependency "rubocop", "~> 1.31.0"
-  spec.add_development_dependency "simplecov", "~> 0.21.2"
+  spec.add_development_dependency "simplecov", "~> 0.22.0"
   spec.add_development_dependency "timecop", "~> 0.9"
   spec.add_development_dependency "webmock"