diff --git a/README.Rmd b/README.Rmd
index c096201..8e9b911 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -16,6 +16,7 @@ knitr::opts_chunk$set(
 # mfair: Matrix Factorization with Auxiliary Information in R
 
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diff --git a/README.md b/README.md
index dd448e1..55776d5 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@
 
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+[![DOI](https://zenodo.org/badge/609644044.svg)](https://zenodo.org/badge/latestdoi/609644044)
 [![Codecov test
 coverage](https://codecov.io/gh/YangLabHKUST/mfair/branch/main/graph/badge.svg)](https://app.codecov.io/gh/YangLabHKUST/mfair?branch=main)
 [![R-CMD-check](https://github.com/YangLabHKUST/mfair/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/YangLabHKUST/mfair/actions/workflows/R-CMD-check.yaml)