diff --git a/signalwire.gemspec b/signalwire.gemspec
index ad23dc9..07ca578 100644
--- a/signalwire.gemspec
+++ b/signalwire.gemspec
@@ -27,7 +27,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'bundler', '~> 2.1'
   spec.add_development_dependency 'bundler-audit', '~> 0.6'
   spec.add_development_dependency 'guard-rspec', '~> 4.7'
-  spec.add_development_dependency 'rack', '~> 2.0'
+  spec.add_development_dependency 'rack', '~> 3.0'
   spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rdoc', '~> 6.1'
   spec.add_development_dependency 'rspec', '~> 3.0'