diff --git a/CHANGELOG.md b/CHANGELOG.md
index e90bdf2..8482c9d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -32,6 +32,7 @@ This document outlines major changes between releases.
 - Add `s3-authmate update-secret` command (#131)
 - Use default registerer for app metrics (#155)
 - Use chi router instead of archived gorlilla/mux (#149)
+- Complete multipart upload doesn't unnecessary copy now. Thus, the total time of multipart upload was reduced by 2 times (#63)
 
 ### Removed
 - Drop `tree.service` param (now endpoints from `peers` section are used) (#133)