diff --git a/committee.gemspec b/committee.gemspec
index 9bdecfed..2aa6cd2c 100644
--- a/committee.gemspec
+++ b/committee.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency "json_schema", "~> 0.14", ">= 0.14.3"
 
-  s.add_dependency "rack", ">= 1.5", "< 3.3"
+  s.add_dependency "rack", ">= 1.5"
   s.add_dependency "openapi_parser", "~> 2.0"
 
   s.add_development_dependency "minitest", "~> 5.3"