diff --git a/AUTHORS b/AUTHORS
index 5927c9dc604..071beddcbab 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -102,5 +102,6 @@ Vinu Rajashekhar <vinutheraj@gmail.com>
 Wei Guangjing <vcc.163@gmail.com>
 William Josephson <wjosephson@gmail.com>
 Yongjian Xu <i3dmaster@gmail.com>
+Yasuhiro Matsumoto <mattn.jp@gmail.com>
 Yuusei Kuwana <kuwana@kumama.org>
 Yuval Pavel Zholkover <paulzhol@gmail.com>
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 8784a0f0a4e..ada228659f5 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -159,6 +159,7 @@ Vish Subramanian <vish@google.com>
 Wei Guangjing <vcc.163@gmail.com>
 William Josephson <wjosephson@gmail.com>
 Yongjian Xu <i3dmaster@gmail.com>
+Yasuhiro Matsumoto <mattn.jp@gmail.com>
 Yuusei Kuwana <kuwana@kumama.org>
 Yuval Pavel Zholkover <paulzhol@gmail.com>
 Yves Junqueira <yves.junqueira@gmail.com>