diff --git a/actionpack/actionpack.gemspec b/actionpack/actionpack.gemspec
index 96d583730a..78b9a4d5a8 100644
--- a/actionpack/actionpack.gemspec
+++ b/actionpack/actionpack.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |s|
   s.add_dependency('rack-cache',    '~> 1.1')
   s.add_dependency('builder',       '~> 3.0.0')
   s.add_dependency('i18n',          '~> 0.6')
-  s.add_dependency('rack',          '~> 1.3.2')
+  s.add_dependency('rack',          '~> 1.3.5')
   s.add_dependency('rack-test',     '~> 0.6.1')
   s.add_dependency('journey',       '~> 1.0.0')
   s.add_dependency('sprockets',     '~> 2.0.2')