diff --git a/README.md b/README.md
index 39eed7c..4e51d2a 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,21 @@
 ```
 npm i @fastify/basic-auth
 ```
+
+### Compatibility
+| Plugin version | Fastify version |
+| ---------------|-----------------|
+| `^6.x`         | `^5.x`          |
+| `^4.x`         | `^4.x`          |
+| `^1.x`         | `^3.x`          |
+| `^0.x`         | `^2.x`          |
+| `^0.x`         | `^1.x`          |
+
+
+Please note that if a Fastify version is out of support, then so are the corresponding versions of this plugin
+in the table above.
+See [Fastify's LTS policy](https://github.com/fastify/fastify/blob/main/docs/Reference/LTS.md) for more details.
+
 ## Usage
 This plugin decorates the fastify instance with a `basicAuth` function, which you can use inside any hook before your route handler, or with [`@fastify/auth`](https://github.com/fastify/fastify-auth).