diff --git a/README.Rmd b/README.Rmd
index fce37a0..59de0f1 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -17,6 +17,7 @@ knitr::opts_chunk$set(
 
 <!-- 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)
 <!-- badges: end -->
 
 The goal of wire is to ...
diff --git a/README.md b/README.md
index 7656c3a..f279804 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,8 @@
 <!-- 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)
 <!-- badges: end -->
 
 The goal of wire is to …