diff --git a/docs/usage/installation.md b/docs/usage/installation.md
index f39626cd..6713f05f 100644
--- a/docs/usage/installation.md
+++ b/docs/usage/installation.md
@@ -75,6 +75,12 @@ Or you can provide your own swagger.json on your host
 docker run -p 80:8080 -e SWAGGER_JSON=/foo/swagger.json -v /bar:/foo swaggerapi/swagger-ui
 ```
 
+You can also provide a URL to a swagger.json on an external host:
+
+```
+docker run -p 80:8080 -e SWAGGER_JSON_URL=https://petstore3.swagger.io/api/v3/openapi.json swaggerapi/swagger-ui
+```
+
 The base URL of the web application can be changed by specifying the `BASE_URL` environment variable:
 
 ```