diff --git a/RELICENSE/yan12125.md b/RELICENSE/yan12125.md
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+# Permission to Relicense under MPLv2
+
+This is a statement by Chih-Hsuan Yen
+that grants permission to relicense its copyrights in the libzmq C++
+library (ZeroMQ) under the Mozilla Public License v2 (MPLv2).
+
+A portion of the commits made by the Github handle "yan12125", with
+commit author "Chih-Hsuan Yen <yan12125@gmail.com>", are copyright of Chih-Hsuan Yen.
+This document hereby grants the libzmq project team to relicense libzmq, 
+including all past, present and future contributions of the author listed above.
+
+Chih-Hsuan Yen
+2019/10/12