diff --git a/docs/release_notes.rst b/docs/release_notes.rst
index a1dbb36..03b6955 100644
--- a/docs/release_notes.rst
+++ b/docs/release_notes.rst
@@ -11,6 +11,7 @@ Unreleased
 ==========
 
 * Support for old serialization formats has been removed.
+* Drop support for Python older than 3.7.
 
 0.13.0
 ======