diff --git a/src/_virtualbox b/src/_virtualbox
index 72155c2..ee628d4 100644
--- a/src/_virtualbox
+++ b/src/_virtualbox
@@ -11,6 +11,7 @@
 #
 #  * Massimiliano Torromeo <massimiliano.torromeo@gmail.com>
 #  * Julien Nicoulaud <julien.nicoulaud@gmail.com>
+#  * Shohei YOSHIDA <https://github.com/syohex>
 #
 # ------------------------------------------------------------------------------