diff --git a/ruby/msgpack.gemspec b/ruby/msgpack.gemspec
index db2fcd5..bb5d9d0 100755
--- a/ruby/msgpack.gemspec
+++ b/ruby/msgpack.gemspec
@@ -1,11 +1,12 @@
 Gem::Specification.new do |s|
   s.platform = Gem::Platform::CURRENT
   s.name = "msgpack"
-  s.version = "0.2.2"
+  s.version = "0.3.0"
   s.summary = "MessagePack"
   s.author = "FURUHASHI Sadayuki"
-  s.email = "frsyuki _at_ users.sourceforge.jp"
-  s.homepage = "https://launchpad.net/msgpack/"
+  s.email = "frsyuki@users.sourceforge.jp"
+  s.homepage = "http://msgpack.sourceforge.jp/"
+  s.rubyforge_project = "msgpack"
   s.require_paths = ["lib", "ext"]
   s.files = ["lib/**/*", "ext/**/*"].map {|g| Dir.glob(g) }.flatten
 end