diff --git a/ChangeLog b/ChangeLog
index a7ac1e65de..b2d741417b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sun Apr  5 09:55:18 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* doc/contributing.rdoc: update Maintainers list.
+
 Sun Apr  5 09:11:00 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* tool/rbinstall.rb: fix bin script permission of bundled gems.
diff --git a/doc/contributing.rdoc b/doc/contributing.rdoc
index 92c1ec46c8..003c5c149c 100644
--- a/doc/contributing.rdoc
+++ b/doc/contributing.rdoc
@@ -246,13 +246,13 @@ version 1.8.7. The current branch maintainers are as follows:
 
 [trunk]
   unnecessary
-[ruby_2_1]
+[ruby_2_2]
   Chikanaga Tomoyuki (nagachika)
+[ruby_2_1]
+  NAKAMURA Usaku (usa)
 [ruby_2_0_0]
   NAKAMURA Usaku (usa)
-[ruby_1_9_3]
-  _unmaintained_
-[ruby_1_9_2, ruby_1_9_1]
+[ruby_1_9_3, ruby_1_9_2, ruby_1_9_1]
   _unmaintained_
 [ruby_1_8]
   _unmaintained_