diff --git a/README.md b/README.md
index d5b4055..67507ad 100644
--- a/README.md
+++ b/README.md
@@ -225,3 +225,8 @@ Copyright (c) 2021 yu9824
 
 - Fix details.
   - Update docstrings and typings.
+
+### v2.1.3
+
+- Fix details.
+  - Update some typings. (You have access to a list of strings that can be used in the metric.)