diff --git a/crates/uv-normalize/src/extra_name.rs b/crates/uv-normalize/src/extra_name.rs
index a789814df..6341ff7fe 100644
--- a/crates/uv-normalize/src/extra_name.rs
+++ b/crates/uv-normalize/src/extra_name.rs
@@ -14,7 +14,7 @@ use crate::{validate_and_normalize_owned, validate_and_normalize_ref, InvalidNam
 /// See:
 /// - <https://peps.python.org/pep-0685/#specification/>
 /// - <https://packaging.python.org/en/latest/specifications/name-normalization/>
-#[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord, Serialize)]
+#[derive(Debug, Default, Clone, PartialEq, Eq, Hash, PartialOrd, Ord, Serialize)]
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 pub struct ExtraName(String);
 
diff --git a/crates/uv-normalize/src/group_name.rs b/crates/uv-normalize/src/group_name.rs
index 90c237eef..b1f2d98ec 100644
--- a/crates/uv-normalize/src/group_name.rs
+++ b/crates/uv-normalize/src/group_name.rs
@@ -11,7 +11,7 @@ use crate::{validate_and_normalize_owned, validate_and_normalize_ref, InvalidNam
 /// See:
 /// - <https://peps.python.org/pep-0735/>
 /// - <https://packaging.python.org/en/latest/specifications/name-normalization/>
-#[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord, Serialize)]
+#[derive(Debug, Default, Clone, PartialEq, Eq, Hash, PartialOrd, Ord, Serialize)]
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 pub struct GroupName(String);
 
diff --git a/crates/uv-normalize/src/package_name.rs b/crates/uv-normalize/src/package_name.rs
index 08cb78104..baaa0dc6d 100644
--- a/crates/uv-normalize/src/package_name.rs
+++ b/crates/uv-normalize/src/package_name.rs
@@ -13,6 +13,7 @@ use crate::{validate_and_normalize_owned, validate_and_normalize_ref, InvalidNam
 /// See: <https://packaging.python.org/en/latest/specifications/name-normalization/>
 #[derive(
     Debug,
+    Default,
     Clone,
     PartialEq,
     Eq,