diff --git a/History.md b/History.md
index 9b468cc0..6f412bce 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,8 @@
+2.1.1
+=======
+
+- PR #217 seller order referenced document
+
 2.1.0
 =======
 2020-01-19