diff --git a/README.md b/README.md
index 4ebc7ea..5d760d4 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,7 @@ License.
 -->
 [![Build Status](https://github.com/julianhyde/quidem/actions/workflows/main.yml/badge.svg?branch=main)](https://github.com/julianhyde/quidem/actions?query=branch%3Amain)
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/net.hydromatic/quidem/badge.svg)](https://maven-badges.herokuapp.com/maven-central/net.hydromatic/quidem)
+[![javadoc](https://javadoc.io/badge2/net.hydromatic/quidem/javadoc.svg)](https://javadoc.io/doc/net.hydromatic/quidem)
 
 # Quidem