diff --git a/docs/changelog.md b/docs/changelog.md
index 46d21354..8bd2ca19 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -4,6 +4,12 @@
 
 Requires libvips v8.10.5
 
+### v0.27.2 - TBD
+
+* Allow the use of non lower case extensions with `toFormat`.
+  [#2581](https://github.com/lovell/sharp/pull/2581)
+  [@florian-busch](https://github.com/florian-busch)
+
 ### v0.27.1 - 27th January 2021
 
 * Ensure TIFF is cast when using float predictor.
diff --git a/docs/humans.txt b/docs/humans.txt
index 43279801..3ec1bdb2 100644
--- a/docs/humans.txt
+++ b/docs/humans.txt
@@ -206,3 +206,6 @@ GitHub: https://github.com/stefanprobst
 
 Name: Thomas Beiganz
 GitHub: https://github.com/beig
+
+Name: Florian Busch
+GitHub: https://github.com/florian-busch