diff --git a/CHANGES b/CHANGES
index 2e77eb1..9ef85d6 100644
--- a/CHANGES
+++ b/CHANGES
@@ -9,6 +9,11 @@
 
  Changes between 1.1.0f and 1.1.1 [xx XXX xxxx]
 
+  *) Add SM4 implemented according to GB/T 32907-2016.
+     [ Jack Lloyd <jack.lloyd@ribose.com>,
+       Ronald Tse <ronald.tse@ribose.com>,
+       Erick Borsboom <erick.borsboom@ribose.com> ]
+
   *) Reimplement -newreq-nodes and ERR_error_string_n; the
      original author does not agree with the license change.
      [Rich Salz]