diff --git a/doc/whats-new.rst b/doc/whats-new.rst
index ab9a0adc101..abe472cc6bb 100644
--- a/doc/whats-new.rst
+++ b/doc/whats-new.rst
@@ -44,6 +44,11 @@ Documentation
   datetime-like dimension is required. (:pull:`3400`)
   By `Justus Magin <https://github.com/keewis>`_.
 
+Internal Changes
+~~~~~~~~~~~~~~~~
+
+- Use Python 3.6 idioms throughout the codebase. (:pull:3419)
+  By `Maximilian Roos <https://github.com/max-sixty>`_
 
 .. _whats-new.0.14.0: