diff --git a/docs/sanic/extensions.md b/docs/sanic/extensions.md
index 8303311a..1325ad0f 100644
--- a/docs/sanic/extensions.md
+++ b/docs/sanic/extensions.md
@@ -6,3 +6,4 @@ A list of Sanic extensions created by the community.
   Allows using redis, memcache or an in memory store.
 - [CORS](https://github.com/ashleysommer/sanic-cors): A port of flask-cors.
 - [Jinja2](https://github.com/lixxu/sanic-jinja2): Support for Jinja2 template.
+- [OpenAPI/Swagger](https://github.com/channelcat/sanic-openapi): OpenAPI support, plus a Swagger UI.
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