diff --git a/CHANGELOG.md b/CHANGELOG.md
index 61830ca..401fd02 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Others
+
+* remove `macos-10.15` and `ubuntu-18.04` virtual environment
+
 ## [2.5.1] - 2023-03-25
 
 ### Hotfix