diff --git a/docs/release-notes.md b/docs/release-notes.md
index 11d039a03..998d94dff 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -1,5 +1,9 @@
 ## Next
 
+## 0.4.0
+
+* Add `openapi_prefix`, support for reverse proxy and mounting sub-applicaitons. See the docs at <a href="https://fastapi.tiangolo.com/tutorial/sub-applications-proxy/" target="_blank">https://fastapi.tiangolo.com/tutorial/sub-applications-proxy/</a>: <a href="https://github.com/tiangolo/fastapi/pull/26" target="_blank">#26</a> by <a href="https://github.com/kabirkhan" target="_blank">@kabirkhan</a>
+
 * Update <a href="https://fastapi.tiangolo.com/tutorial/sql-databases/" target="_blank">docs/tutorial for SQLAlchemy</a> including note about *DB Browser for SQLite*.
 
 ## 0.3.0
diff --git a/mkdocs.yml b/mkdocs.yml
index d3631b7f7..397a21d9c 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -57,7 +57,7 @@ nav:
         - SQL (Relational) Databases: 'tutorial/sql-databases.md'
         - NoSQL (Distributed / Big Data) Databases: 'tutorial/nosql-databases.md'
         - Bigger Applications - Multiple Files: 'tutorial/bigger-applications.md'
-        - Sub Applications - Under a Proxy: 'tutorial/sub-applications-proxy.md'
+        - Sub Applications - Behind a Proxy: 'tutorial/sub-applications-proxy.md'
         - Application Configuration: 'tutorial/application-configuration.md'
         - Extra Starlette options: 'tutorial/extra-starlette.md'    
     - Concurrency and async / await: 'async.md'