diff --git a/actionpack/actionpack.gemspec b/actionpack/actionpack.gemspec
index 29bd16bb11..606abac83a 100644
--- a/actionpack/actionpack.gemspec
+++ b/actionpack/actionpack.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
   s.add_dependency('i18n',             '~> 0.6.0beta1')
   s.add_dependency('rack',             '~> 1.3.0.beta')
   s.add_dependency('rack-test',        '~> 0.6.0')
-  s.add_dependency('rack-mount',       '~> 0.7.3')
+  s.add_dependency('rack-mount',       '~> 0.8.0')
   s.add_dependency('sprockets',        '~> 2.0.0.beta.2')
   s.add_dependency('tzinfo',           '~> 0.3.27')
   s.add_dependency('erubis',           '~> 2.7.0')