diff --git a/README.Rmd b/README.Rmd
index 59de0f1..77fcf6c 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -16,8 +16,9 @@ knitr::opts_chunk$set(
 # wire
 
 <!-- badges: start -->
-[![R-CMD-check](https://github.com/YuhangTom/wire/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/YuhangTom/wire/actions/workflows/R-CMD-check.yaml)
 [![Lifecycle: experimental](https://img.shields.io/badge/lifecycle-experimental-orange.svg)](https://lifecycle.r-lib.org/articles/stages.html#experimental)
+[![Last-changedate](https://img.shields.io/badge/last%20change-`r gsub('-', '--', Sys.Date())`-yellowgreen.svg)](https://github.com/YuhangTom/wire/commits/main)
+[![R-CMD-check](https://github.com/YuhangTom/wire/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/YuhangTom/wire/actions/workflows/R-CMD-check.yaml)
 <!-- badges: end -->
 
 The goal of wire is to ...
diff --git a/README.md b/README.md
index f279804..2c86e9d 100644
--- a/README.md
+++ b/README.md
@@ -5,9 +5,10 @@
 
 <!-- badges: start -->
 
-[![R-CMD-check](https://github.com/YuhangTom/wire/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/YuhangTom/wire/actions/workflows/R-CMD-check.yaml)
 [![Lifecycle:
 experimental](https://img.shields.io/badge/lifecycle-experimental-orange.svg)](https://lifecycle.r-lib.org/articles/stages.html#experimental)
+[![Last-changedate](https://img.shields.io/badge/last%20change-2023--09--24-yellowgreen.svg)](https://github.com/YuhangTom/wire/commits/main)
+[![R-CMD-check](https://github.com/YuhangTom/wire/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/YuhangTom/wire/actions/workflows/R-CMD-check.yaml)
 <!-- badges: end -->
 
 The goal of wire is to …