diff --git a/Cargo.lock b/Cargo.lock
index ac7e02a6b76..0becc6c67bb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -582,7 +582,7 @@ dependencies = [
 
 [[package]]
 name = "crates-io"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "curl",
  "percent-encoding",
diff --git a/crates/crates-io/Cargo.toml b/crates/crates-io/Cargo.toml
index d06dacdfa43..f1b92602e9d 100644
--- a/crates/crates-io/Cargo.toml
+++ b/crates/crates-io/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "crates-io"
-version = "0.39.0"
+version = "0.39.1"
 rust-version.workspace = true
 edition.workspace = true
 license.workspace = true
diff --git a/crates/crates-io/lib.rs b/crates/crates-io/lib.rs
index 757241fd344..1764ce527de 100644
--- a/crates/crates-io/lib.rs
+++ b/crates/crates-io/lib.rs
@@ -38,6 +38,10 @@ pub struct Crate {
     pub max_version: String,
 }
 
+/// This struct is serialized as JSON and sent as metadata ahead of the crate
+/// tarball when publishing crates to a crate registry like crates.io.
+///
+/// see <https://doc.rust-lang.org/cargo/reference/registry-web-api.html#publish>
 #[derive(Serialize, Deserialize)]
 pub struct NewCrate {
     pub name: String,