diff --git a/CHANGES.rst b/CHANGES.rst
index 1e509cd..d22497c 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -7,9 +7,17 @@ Version 0.30.1
 
 Bugs fixed:
 
-- regression: certain special values in argument default value would cause an
+- Regression: certain special values in argument default value would cause an
   exception (#204)
 
+Enhancements:
+
+- Improved the tutorial.
+
+Other changes:
+
+- Added `py.typed` marker file for :pep:`561`.
+
 Version 0.30.0
 --------------