Update CHANGES
diff --git a/CHANGES.txt b/CHANGES.txt
index a8c0547..3422e4d 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -38,6 +38,7 @@
 - Add RFC5275 providing CMS Symmetric Key Management and Distribution
 - Add RFC8702 providing SHAKE One-way Hash Functions in the CMS
 - Add RFC8708 providing HSS/LMS Hash-based Signature Algorithm for CMS
+- Advance copyright statement to year 2020
 
 Revision 0.2.8, released 16-11-2019
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