diff --git a/HISTORY.rst b/HISTORY.rst
index 244e8de..b2d8340 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -6,6 +6,9 @@ History
 -------------------
 
 - The first release after renaming hydrodata to pygeohydro.
+- Make ``mypy`` checks more strict and fix all the errors and prevent possible
+  bugs.
+- Speed up CI testing by using ``mamba`` and caching.
 
 0.9.0 (2021-02-14)
 ------------------