diff --git a/README.md b/README.md
index 1de0034..706d43b 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@
 [![PyPI version](https://badge.fury.io/py/cvxball.svg)](https://badge.fury.io/py/cvxball)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE.txt)
 [![CI](https://github.com/cvxgrp/cvxball/actions/workflows/ci.yml/badge.svg)](https://github.com/cvxgrp/cvxball/actions/workflows/ci.yml)
+[![Coverage Status](https://coveralls.io/repos/github/cvxgrp/cvxball/badge.svg?branch=main)](https://coveralls.io/github/cvxgrp/cvxball?branch=main)
 [![Created with Cradle](https://img.shields.io/badge/Created%20with-Cradle-blue?style=flat-square)](https://github.com/tschm/package)
 
 We compute the smallest enclosing circle/ball for a set of points.