diff --git a/docs/en/docs/advanced/extending-openapi.md b/docs/en/docs/advanced/extending-openapi.md
index d1b14bc00..36619696b 100644
--- a/docs/en/docs/advanced/extending-openapi.md
+++ b/docs/en/docs/advanced/extending-openapi.md
@@ -132,8 +132,8 @@ You can probably right-click each link and select an option similar to `Save lin
 
 **Swagger UI** uses the files:
 
-* <a href="https://cdn.jsdelivr.net/npm/swagger-ui-dist@3/swagger-ui-bundle.js" class="external-link" target="_blank">`swagger-ui-bundle.js`</a>
-* <a href="https://cdn.jsdelivr.net/npm/swagger-ui-dist@3/swagger-ui.css" class="external-link" target="_blank">`swagger-ui.css`</a>
+* <a href="https://cdn.jsdelivr.net/npm/swagger-ui-dist@4/swagger-ui-bundle.js" class="external-link" target="_blank">`swagger-ui-bundle.js`</a>
+* <a href="https://cdn.jsdelivr.net/npm/swagger-ui-dist@4/swagger-ui.css" class="external-link" target="_blank">`swagger-ui.css`</a>
 
 And **ReDoc** uses the file: