diff --git a/RELEASE_NOTES b/RELEASE_NOTES
index 23b5d69..7b0c350 100644
--- a/RELEASE_NOTES
+++ b/RELEASE_NOTES
@@ -3,6 +3,11 @@
 ** Keir Fraser <keir.xen@gmail.com>
 ************************************
 
+** v1.21 - 23 October 2024
+ - micropolis: Codec for Micropolis hard-sectored MFM disks
+ - gw reset: By default do not reset configured "gw delays"
+ - Fix setup.py installation: Require bitarray earlier than v3
+
 ** v1.20 - 28 September 2024
  - Thomson MO/TO: thomson.* formats and *.fd images
  - EDSK: HD and ED recording rates