diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1b63f53..b1a0800 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Change Log
 
+## [v3.7.0](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/releases/tag/v3.7.0) / 2023-09-17
+
+* [#28](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/pull/28) upgrade Python (3.8.2) => (CPython 3.11.4)
+* [#28](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/pull/28) update README.md
+* [#28](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/pull/28) update CHANGELOG.md
+
 ## [v3.6.0](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/releases/tag/v3.6.0) / 2023-09-10
 
 * [#27](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/pull/27) update README.md
diff --git a/README.md b/README.md
index 636c144..798fa50 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,3 @@
-![](https://img.shields.io/badge/Python-3.8.2-informational.svg)
 ![](https://img.shields.io/badge/Python-3.11.4-informational.svg)
 ![](https://img.shields.io/badge/pycodestyle-2.11.0-informational.svg)