diff --git a/ChangeLog b/ChangeLog
index 005a925f28..f1958f6d1c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Mar 24 21:59:10 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
+
+	* doc/contributing.rdoc: update Maintainers list.
+
 Tue Mar 24 19:10:24 2015  Koichi Sasada  <ko1@atdot.net>
 
 	* gc.c (gc_writebarrier_generational): fix messages for rb_bug().
diff --git a/doc/contributing.rdoc b/doc/contributing.rdoc
index c6ccc68302..92c1ec46c8 100644
--- a/doc/contributing.rdoc
+++ b/doc/contributing.rdoc
@@ -246,10 +246,12 @@ version 1.8.7. The current branch maintainers are as follows:
 
 [trunk]
   unnecessary
-[ruby_2_0_0]
+[ruby_2_1]
   Chikanaga Tomoyuki (nagachika)
-[ruby_1_9_3]
+[ruby_2_0_0]
   NAKAMURA Usaku (usa)
+[ruby_1_9_3]
+  _unmaintained_
 [ruby_1_9_2, ruby_1_9_1]
   _unmaintained_
 [ruby_1_8]