diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index ddc2b8fc731700efdefd1d7410490b19ad672f68..6065e4aca6688e9ba0cb0ca5acba552bcc4ced6d 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -2,6 +2,19 @@ This document contains the ``fslpy`` release history in reverse chronological
 order.
 
 
+
+3.6.0 (Under development)
+-------------------------
+
+
+Changed
+^^^^^^^
+
+
+* The :class:`.TaskThread` now allows an error handler function to be
+  specified, which is run on the :mod:`.idle` loop.
+
+
 3.5.3 (Tuesday 9th February 2021)
 ---------------------------------