diff --git a/src/api/s3/copy.rs b/src/api/s3/copy.rs
index 7ee1847d..97136096 100644
--- a/src/api/s3/copy.rs
+++ b/src/api/s3/copy.rs
@@ -853,7 +853,7 @@ pub struct CopyObjectResult {
 
 #[derive(Debug, Serialize, PartialEq, Eq)]
 pub struct CopyPartResult {
-	#[serde(serialize_with = "xmlns_tag")]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag")]
 	pub xmlns: (),
 	#[serde(rename = "LastModified")]
 	pub last_modified: s3_xml::Value,
diff --git a/src/api/s3/cors.rs b/src/api/s3/cors.rs
index 4e1d8ece..ca78ae3f 100644
--- a/src/api/s3/cors.rs
+++ b/src/api/s3/cors.rs
@@ -86,7 +86,7 @@ pub async fn handle_put_cors(
 #[derive(Debug, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
 #[serde(rename = "CORSConfiguration")]
 pub struct CorsConfiguration {
-	#[serde(serialize_with = "xmlns_tag", skip_deserializing)]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag", skip_deserializing)]
 	pub xmlns: (),
 	#[serde(rename = "CORSRule")]
 	pub cors_rules: Vec<CorsRule>,
diff --git a/src/api/s3/lifecycle.rs b/src/api/s3/lifecycle.rs
index ba6aeda2..22087183 100644
--- a/src/api/s3/lifecycle.rs
+++ b/src/api/s3/lifecycle.rs
@@ -83,7 +83,7 @@ pub async fn handle_put_lifecycle(
 
 #[derive(Debug, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
 pub struct LifecycleConfiguration {
-	#[serde(serialize_with = "xmlns_tag", skip_deserializing)]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag", skip_deserializing)]
 	pub xmlns: (),
 	#[serde(rename = "Rule")]
 	pub lifecycle_rules: Vec<LifecycleRule>,
diff --git a/src/api/s3/website.rs b/src/api/s3/website.rs
index 506df69e..c4863e7f 100644
--- a/src/api/s3/website.rs
+++ b/src/api/s3/website.rs
@@ -110,7 +110,7 @@ pub async fn handle_put_website(
 
 #[derive(Debug, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
 pub struct WebsiteConfiguration {
-	#[serde(serialize_with = "xmlns_tag", skip_deserializing)]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag", skip_deserializing)]
 	pub xmlns: (),
 	#[serde(rename = "ErrorDocument")]
 	pub error_document: Option<Key>,
diff --git a/src/api/s3/xml.rs b/src/api/s3/xml.rs
index bfe95fff..2bb265d4 100644
--- a/src/api/s3/xml.rs
+++ b/src/api/s3/xml.rs
@@ -61,7 +61,7 @@ pub struct ListAllMyBucketsResult {
 
 #[derive(Debug, Serialize, PartialEq, Eq)]
 pub struct LocationConstraint {
-	#[serde(serialize_with = "xmlns_tag")]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag")]
 	pub xmlns: (),
 	#[serde(rename = "$value")]
 	pub region: String,
@@ -103,7 +103,7 @@ pub struct DeleteError {
 
 #[derive(Debug, Serialize, PartialEq, Eq)]
 pub struct DeleteResult {
-	#[serde(serialize_with = "xmlns_tag")]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag")]
 	pub xmlns: (),
 	#[serde(rename = "Deleted")]
 	pub deleted: Vec<Deleted>,
@@ -113,7 +113,7 @@ pub struct DeleteResult {
 
 #[derive(Debug, Serialize, PartialEq, Eq)]
 pub struct InitiateMultipartUploadResult {
-	#[serde(serialize_with = "xmlns_tag")]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag")]
 	pub xmlns: (),
 	#[serde(rename = "Bucket")]
 	pub bucket: Value,
@@ -125,7 +125,7 @@ pub struct InitiateMultipartUploadResult {
 
 #[derive(Debug, Serialize, PartialEq, Eq)]
 pub struct CompleteMultipartUploadResult {
-	#[serde(serialize_with = "xmlns_tag")]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag")]
 	pub xmlns: (),
 	#[serde(rename = "Location")]
 	pub location: Option<Value>,
@@ -175,7 +175,7 @@ pub struct ListMultipartItem {
 
 #[derive(Debug, Serialize, PartialEq, Eq)]
 pub struct ListMultipartUploadsResult {
-	#[serde(serialize_with = "xmlns_tag")]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag")]
 	pub xmlns: (),
 	#[serde(rename = "Bucket")]
 	pub bucket: Value,
@@ -227,7 +227,7 @@ pub struct PartItem {
 
 #[derive(Debug, Serialize, PartialEq, Eq)]
 pub struct ListPartsResult {
-	#[serde(serialize_with = "xmlns_tag")]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag")]
 	pub xmlns: (),
 	#[serde(rename = "Bucket")]
 	pub bucket: Value,
@@ -275,7 +275,7 @@ pub struct CommonPrefix {
 
 #[derive(Debug, Serialize, PartialEq, Eq)]
 pub struct ListBucketResult {
-	#[serde(serialize_with = "xmlns_tag")]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag")]
 	pub xmlns: (),
 	#[serde(rename = "Name")]
 	pub name: Value,
@@ -309,7 +309,7 @@ pub struct ListBucketResult {
 
 #[derive(Debug, Serialize, PartialEq, Eq)]
 pub struct VersioningConfiguration {
-	#[serde(serialize_with = "xmlns_tag")]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag")]
 	pub xmlns: (),
 	#[serde(rename = "Status")]
 	pub status: Option<Value>,
@@ -317,7 +317,7 @@ pub struct VersioningConfiguration {
 
 #[derive(Debug, Serialize, PartialEq, Eq)]
 pub struct PostObject {
-	#[serde(serialize_with = "xmlns_tag")]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag")]
 	pub xmlns: (),
 	#[serde(rename = "Location")]
 	pub location: Value,
@@ -331,9 +331,9 @@ pub struct PostObject {
 
 #[derive(Debug, Serialize, PartialEq, Eq)]
 pub struct Grantee {
-	#[serde(rename = "xmlns:xsi", serialize_with = "xmlns_xsi_tag")]
+	#[serde(rename = "@xmlns:xsi", serialize_with = "xmlns_xsi_tag")]
 	pub xmlns_xsi: (),
-	#[serde(rename = "xsi:type")]
+	#[serde(rename = "@xsi:type")]
 	pub typ: String,
 	#[serde(rename = "DisplayName")]
 	pub display_name: Option<Value>,
@@ -357,7 +357,7 @@ pub struct AccessControlList {
 
 #[derive(Debug, Serialize, PartialEq, Eq)]
 pub struct AccessControlPolicy {
-	#[serde(serialize_with = "xmlns_tag")]
+	#[serde(rename = "@xmlns", serialize_with = "xmlns_tag")]
 	pub xmlns: (),
 	#[serde(rename = "Owner")]
 	pub owner: Option<Owner>,