diff --git a/wpscan.gemspec b/wpscan.gemspec
index 08691502..3c19a6fe 100644
--- a/wpscan.gemspec
+++ b/wpscan.gemspec
@@ -30,7 +30,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rspec-its',           '~> 1.3.0'
   s.add_development_dependency 'rubocop',             '~> 1.7.0'
   s.add_development_dependency 'rubocop-performance', '~> 1.9.0'
-  s.add_development_dependency 'simplecov',           '~> 0.20.0'
+  s.add_development_dependency 'simplecov',           '~> 0.21.0'
   s.add_development_dependency 'simplecov-lcov',      '~> 0.8.0'
   s.add_development_dependency 'stackprof',           '~> 0.2.12'
   s.add_development_dependency 'webmock',             '~> 3.11.0'