diff --git a/README.md b/README.md
index 01855fc4..2ea9127b 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@
 [![Codecov](https://codecov.io/gh/tkf/BangBang.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/tkf/BangBang.jl)
 [![Coveralls](https://coveralls.io/repos/github/tkf/BangBang.jl/badge.svg?branch=master)](https://coveralls.io/github/tkf/BangBang.jl?branch=master)
 [![Aqua QA](https://img.shields.io/badge/Aqua.jl-%F0%9F%8C%A2-aqua.svg)](https://github.com/tkf/Aqua.jl)
+[![GitHub commits since tagged version](https://img.shields.io/github/commits-since/tkf/BangBang.jl/v0.1.1.svg?style=social&logo=github)](https://github.com/tkf/BangBang.jl)
 
 BangBang.jl implements functions whose name ends with `!!`.  Those
 functions provide a uniform interface for mutable and immutable data