diff --git a/CHANGELOG.md b/CHANGELOG.md
index dec0627..e3c86db 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,16 @@ This document outlines major changes between releases.
 - Update neo-go to v0.101.0 (#8)
 - Update viper to v1.15.0 (#8)
 - Errors have become more detailed (#18)
+- Update system attribute names (#22)
+
+### Updating from v0.26.0
+
+To set system attributes use updated headers
+(you can use old ones for now, but their support will be dropped in the future releases):
+
+* `X-Attribute-Neofs-*` -> `X-Attribute-System-*`
+* `X-Attribute-NEOFS-*` -> `X-Attribute-SYSTEM-*`
+* `X-Attribute-neofs-*` -> `X-Attribute-system-*`
 
 ## [0.26.0] - 2022-12-28