diff --git a/trino-client.gemspec b/trino-client.gemspec
index 9687b898..2e23dcdb 100644
--- a/trino-client.gemspec
+++ b/trino-client.gemspec
@@ -26,6 +26,6 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency "rspec", ["~> 2.13.0"]
   gem.add_development_dependency "webmock", ["~> 3.0"]
   gem.add_development_dependency "addressable", ["~> 2.4.0"] # 2.5.0 doesn't support Ruby 1.9.3
-  gem.add_development_dependency "simplecov", ["~> 0.10.0"]
+  gem.add_development_dependency "simplecov", "~> 0.22.0"
   gem.add_development_dependency "standard", "~> 1.12.1"
 end