README.md in trema-0.3.21 vs README.md in trema-0.4.0

@@ -25,11 +25,11 @@
 Supported Platforms
 -------------------
 
 Trema supports GNU/Linux only. And it has been tested on the following environments:
 
-* Ruby 1.8.7 (1.9.x is NOT supported yet)
+* Ruby 1.8.7 or higher
 * RubyGems 1.3.6 or higher
 * Ubuntu 13.04, 12.10, 12.04, 11.10, and 10.04 (i386/amd64, Desktop Edition)
 * Debian GNU/Linux 7.0 and 6.0 (i386/amd64)
 * Fedora 16 (i386/x86_64)
 
@@ -46,22 +46,19 @@
 Getting Started
 ---------------
 
 1.Install the prerequisites at the command prompt:
 
-    (In Ubuntu 13.04, 12.10, or Debian GNU/Linux 7.0)
-    $ sudo apt-get install gcc make ruby1.8 rubygems1.8 ruby1.8-dev libpcap-dev libsqlite3-dev
+    (In Ubuntu or Debian GNU/Linux)
+    $ sudo apt-get install gcc make ruby rubygems ruby-dev libpcap-dev libsqlite3-dev libglib2.0-dev
 
-    (In Ubuntu 12.04, 11.10 or Debian GNU/Linux 6.0)
-    $ sudo apt-get install gcc make ruby rubygems ruby-dev libpcap-dev libsqlite3-dev
-
     (In Ubuntu 10.04)
-    $ sudo apt-get install gcc make ruby rubygems ruby-dev libopenssl-ruby libpcap-dev libsqlite3-dev
-    $ sudo gem install rubygems-update
+    $ sudo apt-get install gcc make ruby rubygems ruby-dev libopenssl-ruby libpcap-dev libsqlite3-dev libglib2.0-dev
+    $ sudo gem install rubygems-update --version 2.0.8
     $ sudo /var/lib/gems/1.8/bin/update_rubygems
 
     (In Fedora 16)
-    $ sudo yum install gcc make ruby rubygems ruby-devel libpcap-devel libsqlite3x-devel
+    $ sudo yum install gcc make ruby rubygems ruby-devel libpcap-devel libsqlite3x-devel glib2-devel
 
 2.Install Trema at the command prompt:
 
     $ sudo gem install trema