diff --git a/zipruby/zipruby-compat.gemspec b/zipruby/zipruby-compat.gemspec
index da3d917..b4c175f 100644
--- a/zipruby/zipruby-compat.gemspec
+++ b/zipruby/zipruby-compat.gemspec
@@ -7,7 +7,4 @@ Gem::Specification.new do |spec|
   spec.email             = 'jaw@jawspeak.com'
   spec.homepage          = 'https://github.com/jawspeak/zipruby-compatibility-with-rubyzip-fork'
   spec.extensions        = 'ext/extconf.rb'
-  spec.has_rdoc          = true
-  spec.rdoc_options      << '--title' << 'Zip/Ruby-Compat - Ruby bindings for libzip.'
-  spec.extra_rdoc_files  = %w(README.txt zipruby.c LICENSE.libzip ChangeLog)
 end
diff --git a/zipruby/zipruby-mswin32.gemspec b/zipruby/zipruby-mswin32.gemspec
index 6c06771..7f4b658 100644
--- a/zipruby/zipruby-mswin32.gemspec
+++ b/zipruby/zipruby-mswin32.gemspec
@@ -10,8 +10,5 @@ Gem::Specification.new do |spec|
   spec.author            = 'winebarrel'
   spec.email             = 'sgwr_dts@yahoo.co.jp'
   spec.homepage          = 'http://zipruby.rubyforge.org'
-  spec.has_rdoc          = true
-  spec.rdoc_options      << '--title' << 'Zip/Ruby - Ruby bindings for libzip.'
-  spec.extra_rdoc_files  = %w(README.txt zipruby.c LICENSE.libzip ChangeLog)
   spec.rubyforge_project = 'zipruby'
 end
diff --git a/zipruby/zipruby1.8-mswin32.gemspec b/zipruby/zipruby1.8-mswin32.gemspec
index 4d614d4..5182760 100644
--- a/zipruby/zipruby1.8-mswin32.gemspec
+++ b/zipruby/zipruby1.8-mswin32.gemspec
@@ -10,8 +10,5 @@ Gem::Specification.new do |spec|
   spec.author            = 'winebarrel'
   spec.email             = 'sgwr_dts@yahoo.co.jp'
   spec.homepage          = 'http://zipruby.rubyforge.org'
-  spec.has_rdoc          = true
-  spec.rdoc_options      << '--title' << 'Zip/Ruby - Ruby bindings for libzip.'
-  spec.extra_rdoc_files  = %w(README.txt zipruby.c LICENSE.libzip ChangeLog)
   spec.rubyforge_project = 'zipruby'
 end
diff --git a/zipruby/zipruby1.9-mswin32.gemspec b/zipruby/zipruby1.9-mswin32.gemspec
index b538a9e..fcefcf2 100644
--- a/zipruby/zipruby1.9-mswin32.gemspec
+++ b/zipruby/zipruby1.9-mswin32.gemspec
@@ -10,8 +10,5 @@ Gem::Specification.new do |spec|
   spec.author            = 'winebarrel'
   spec.email             = 'sgwr_dts@yahoo.co.jp'
   spec.homepage          = 'http://zipruby.rubyforge.org'
-  spec.has_rdoc          = true
-  spec.rdoc_options      << '--title' << 'Zip/Ruby - Ruby bindings for libzip.'
-  spec.extra_rdoc_files  = %w(README.txt zipruby.c LICENSE.libzip ChangeLog)
   spec.rubyforge_project = 'zipruby'
 end