diff --git a/CHANGE_LOG b/CHANGE_LOG
index d9a22464..fe086326 100644
--- a/CHANGE_LOG
+++ b/CHANGE_LOG
@@ -1,5 +1,6 @@
 2021-XX-XX   2.1.1:
 -------------------
+  * add type hinting (see PEP 484, 561) using .pyi files
   * add tests