diff --git a/CHANGELOG.md b/CHANGELOG.md
index 016b6d1..b4e47c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,4 +5,6 @@ Which is based on [Keep A Changelog](http://keepachangelog.com/)
 
 ## [Unreleased]
 
+## v1.0.0 - 2021-09-14
+
 - first version
diff --git a/README.md b/README.md
index d8a0f62..4e2221e 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 # Ansible role: Squid
 
+[![Version](https://img.shields.io/badge/latest_version-1.0.0-green.svg)](https://git.yaegashi.fr/nishiki/ansible-role-squid/releases)
 [![License](https://img.shields.io/badge/license-Apache--2.0-blue.svg)](https://git.yaegashi.fr/nishiki/ansible-role-squid/src/branch/master/LICENSE)
 
 Install and configure Squid