diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0c5e9b..944c87f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,10 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
+## 1.0.5 - 2019-11-14
+### Changed
+- Update Gem spec to require rack >= 1.6.0
+
 ## 1.0.4 - 2019-11-13
 ### Security
 - Escape and resolve path before evaluating resource rules (thanks to Colby Morgan)
diff --git a/lib/rack/cors/version.rb b/lib/rack/cors/version.rb
index 513b551..f57c09c 100644
--- a/lib/rack/cors/version.rb
+++ b/lib/rack/cors/version.rb
@@ -1,5 +1,5 @@
 module Rack
   class Cors
-    VERSION = "1.0.4"
+    VERSION = "1.0.5"
   end
 end
diff --git a/rack-cors.gemspec b/rack-cors.gemspec
index d14597e..731f8d2 100644
--- a/rack-cors.gemspec
+++ b/rack-cors.gemspec
@@ -18,6 +18,7 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
+  spec.add_dependency "rack", ">= 1.6.0"
   spec.add_development_dependency "bundler", ">= 1.16.0", '< 3'
   spec.add_development_dependency "rake", "~> 12.3.0"
   spec.add_development_dependency "minitest", "~> 5.11.0"