diff --git a/README.md b/README.md
index d676e89..2955551 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 # ts-ucan
+![UCAN](https://img.shields.io/badge/UCAN-v0.8.1-blue)
 [![NPM](https://img.shields.io/npm/v/ucans)](https://www.npmjs.com/package/ucans)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://github.com/fission-suite/blob/master/LICENSE)
 [![Discussions](https://img.shields.io/github/discussions/ucan-wg/ts-ucan)](https://github.com/ucan-wg/ts-ucan/discussions)
diff --git a/packages/ucans/README.md b/packages/ucans/README.md
index 7c4f12a..cc53b3b 100644
--- a/packages/ucans/README.md
+++ b/packages/ucans/README.md
@@ -1,4 +1,5 @@
 # ts-ucan
+![UCAN](https://img.shields.io/badge/UCAN-v0.8.1-blue)
 [![NPM](https://img.shields.io/npm/v/ucans)](https://www.npmjs.com/package/ucans)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://github.com/fission-suite/blob/master/LICENSE)
 [![Discussions](https://img.shields.io/github/discussions/ucan-wg/ts-ucan)](https://github.com/ucan-wg/ts-ucan/discussions)