diff --git a/docs/release-notes.md b/docs/release-notes.md
index 30186497c..b1f37d48c 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -1,5 +1,7 @@
 ## Next release
 
+* Make Swagger UI and ReDoc route handlers (*path operations*) be `async` functions instead of lambdas to improve performance. PR [#241](https://github.com/tiangolo/fastapi/pull/241) by [@Trim21](https://github.com/Trim21).
+
 * Make Swagger UI and ReDoc URLs parameterizable, allowing to host and serve local versions of them and have offline docs. PR [#112](https://github.com/tiangolo/fastapi/pull/112) by [@euri10](https://github.com/euri10).
 
 ## 0.22.0