diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 8d77ddb5..2d89bf22 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,3 +1,10 @@
+v4.19.1
+=======
+
+* Single label hostnames are now properly considered valid according to the ``hostname`` format.
+  This is the behavior specified by the relevant RFC (1123).
+  IDN hostname behavior was already correct.
+
 v4.19.0
 =======