diff --git a/src/lib.rs b/src/lib.rs
index 9fa6767..ee5636d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -38,11 +38,6 @@
 use std::fmt::{self, Debug, Display, Formatter};
 use std::num::NonZeroUsize;
 
-/// Implement serde::Serialize and serde::Deserialize traits for Tree
-///
-/// # Warning
-/// Serialize and Deserialize implementations are recursive. They require an amount of stack memory
-/// proportional to the tree depth.
 #[cfg(feature = "serde")]
 pub mod serde;
 
diff --git a/src/serde.rs b/src/serde.rs
index 08338e9..f70cd82 100644
--- a/src/serde.rs
+++ b/src/serde.rs
@@ -1,3 +1,9 @@
+//! Implement `serde::Serialize` and `serde::Deserialize` traits for Tree
+//!
+//! # Warning
+//! Serialize and Deserialize implementations are recursive. They require an amount of stack memory
+//! proportional to the depth of the tree.
+
 use std::{fmt, marker::PhantomData};
 
 use serde::{