diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index ce4881625db90f191f964d82c459f4b60ef54a03..7f82d1e5dd44526a94b1c4d7b14d25e5c0e5852d 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -2,6 +2,19 @@ This document contains the ``fslpy`` release history in reverse chronological
 order.
 
 
+
+3.21.1 (Friday 27th September 2024)
+-----------------------------------
+
+
+Changed
+^^^^^^^
+
+* The :func:`.fixlabels.loadLabelFile` and :func:`.fixlabels.saveLabelFile`
+  functions now support FIX label files which contain classification
+  probabilities, as generated by pyfix >= 0.9.0, and old FIX >= 1.069 (!464).
+
+
 3.21.0 (Tuesday 23rd July 2024)
 -------------------------------