diff --git a/docs/release-notes.md b/docs/release-notes.md
index 844fe2ef..f9bd04b9 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -185,7 +185,7 @@ March 9, 2023
 March 9, 2023
 
 ### Added
-* Support [lifespan state](/lifespan/) [#2060](https://github.com/encode/starlette/pull/2060),
+* Support [lifespan state](lifespan.md) [#2060](https://github.com/encode/starlette/pull/2060),
   [#2065](https://github.com/encode/starlette/pull/2065) and [#2064](https://github.com/encode/starlette/pull/2064).
 
 ### Changed
diff --git a/docs/testclient.md b/docs/testclient.md
index d25c75d6..33da3348 100644
--- a/docs/testclient.md
+++ b/docs/testclient.md
@@ -67,7 +67,7 @@ case you should use `client = TestClient(app, raise_server_exceptions=False)`.
     If you want the `TestClient` to run the `lifespan` handler,
     you will need to use the `TestClient` as a context manager. It will
     not be triggered when the `TestClient` is instantiated. You can learn more about it
-    [here](/lifespan/#running-lifespan-in-tests).
+    [here](lifespan.md#running-lifespan-in-tests).
 
 ### Selecting the Async backend
 
diff --git a/requirements.txt b/requirements.txt
index 07f953f0..5fd635b0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ trio==0.24.0
 
 # Documentation
 mkdocs==1.5.3
-mkdocs-material==9.5.3
+mkdocs-material==9.1.17
 mkautodoc==0.2.0
 
 # Packaging