diff --git a/actix-web-lab/src/cbor.rs b/actix-web-lab/src/cbor.rs
index f72085e9..96687f0e 100644
--- a/actix-web-lab/src/cbor.rs
+++ b/actix-web-lab/src/cbor.rs
@@ -10,7 +10,9 @@ use serde::Serialize;
 
 static CBOR_MIME: LazyLock<Mime> = LazyLock::new(|| "application/cbor".parse().unwrap());
 
-/// CBOR responder.
+/// [CBOR] responder.
+///
+/// [CBOR]: https://cbor.io/
 #[derive(Debug, Display)]
 pub struct Cbor<T>(pub T);
 
diff --git a/actix-web-lab/src/msgpack.rs b/actix-web-lab/src/msgpack.rs
index 46ea4cc9..0a95ad09 100644
--- a/actix-web-lab/src/msgpack.rs
+++ b/actix-web-lab/src/msgpack.rs
@@ -10,9 +10,11 @@ use serde::Serialize;
 
 static MSGPACK_MIME: LazyLock<Mime> = LazyLock::new(|| "application/msgpack".parse().unwrap());
 
-/// MessagePack responder.
+/// [MessagePack] responder.
 ///
 /// If you require the fields to be named, use [`MessagePackNamed`].
+///
+/// [MessagePack]: https://msgpack.org/
 #[derive(Debug, Display)]
 pub struct MessagePack<T>(pub T);
 
diff --git a/actix-web-lab/src/ndjson.rs b/actix-web-lab/src/ndjson.rs
index bc6961cc..84dd76cd 100644
--- a/actix-web-lab/src/ndjson.rs
+++ b/actix-web-lab/src/ndjson.rs
@@ -39,7 +39,7 @@ pin_project! {
     /// }
     /// ```
     ///
-    /// [NDJSON]: https://ndjson.org/
+    /// [NDJSON]: https://github.com/ndjson/ndjson-spec
     pub struct NdJson<S> {
         // The wrapped item stream.
         #[pin]