diff --git a/crates/uv-publish/Cargo.toml b/crates/uv-publish/Cargo.toml
index 0317a4685606a..d1fa65253e3ac 100644
--- a/crates/uv-publish/Cargo.toml
+++ b/crates/uv-publish/Cargo.toml
@@ -36,7 +36,7 @@ futures = { workspace = true }
 glob = { workspace = true }
 itertools = { workspace = true }
 reqwest = { workspace = true }
-reqwest-middleware = { workspace = true }
+reqwest-middleware = { workspace = true, features = ["json"] }
 reqwest-retry = { workspace = true }
 rustc-hash = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
diff --git a/crates/uv-publish/src/trusted_publishing/pypi.rs b/crates/uv-publish/src/trusted_publishing/pypi.rs
index 54d3e6d737054..5d1644211ddab 100644
--- a/crates/uv-publish/src/trusted_publishing/pypi.rs
+++ b/crates/uv-publish/src/trusted_publishing/pypi.rs
@@ -83,7 +83,7 @@ impl TrustedPublishingService for PyPIPublishingService<'_> {
         let response = self
             .client
             .post(Url::from(mint_token_url.clone()))
-            .body(serde_json::to_vec(&mint_token_payload)?)
+            .json(&mint_token_payload)
             .send()
             .await
             .map_err(|err| {
diff --git a/crates/uv-publish/src/trusted_publishing/pyx.rs b/crates/uv-publish/src/trusted_publishing/pyx.rs
index 60fdba92cf308..5670272ef0ee6 100644
--- a/crates/uv-publish/src/trusted_publishing/pyx.rs
+++ b/crates/uv-publish/src/trusted_publishing/pyx.rs
@@ -109,7 +109,7 @@ impl TrustedPublishingService for PyxPublishingService<'_> {
         let response = self
             .client
             .post(Url::from(mint_token_url.clone()))
-            .body(serde_json::to_vec(&mint_token_payload)?)
+            .json(&mint_token_payload)
             .send()
             .await
             .map_err(|err| {