diff --git a/roda-unpoly.gemspec b/roda-unpoly.gemspec
index 914266b..3c5876d 100644
--- a/roda-unpoly.gemspec
+++ b/roda-unpoly.gemspec
@@ -14,6 +14,6 @@ Gem::Specification.new do |spec|
   spec.add_dependency "roda", ">= 2.0", "< 4.0"
   spec.add_development_dependency "minitest", "~> 5.0"
   spec.add_development_dependency "rake", ">= 12.3.3"
-  spec.add_development_dependency "rack-test", "~> 0.6"
+  spec.add_development_dependency "rack-test", "~> 2.0"
   spec.add_development_dependency "standard", "~> 1.26"
 end