diff --git a/yaserde/src/de/mod.rs b/yaserde/src/de/mod.rs
index 374b124..86bbbe6 100644
--- a/yaserde/src/de/mod.rs
+++ b/yaserde/src/de/mod.rs
@@ -45,7 +45,7 @@ impl<'de, R: Read> Deserializer<R> {
     }
 
     if let Some(ref next) = self.peeked {
-      Ok(&next)
+      Ok(next)
     } else {
       Err(String::from("unable to peek next item"))
     }
diff --git a/yaserde_derive/src/de/expand_enum.rs b/yaserde_derive/src/de/expand_enum.rs
index fcc5093..cf42a28 100644
--- a/yaserde_derive/src/de/expand_enum.rs
+++ b/yaserde_derive/src/de/expand_enum.rs
@@ -16,13 +16,13 @@ pub fn parse(
   let variables: Tokens = data_enum
     .variants
     .iter()
-    .map(|ref variant| match variant.fields {
+    .map(|variant| match variant.fields {
       Fields::Unit => None,
       Fields::Named(ref fields) => {
         let enum_fields = fields
           .named
           .iter()
-          .map(|ref field| {
+          .map(|field| {
             let field_label = field.ident;
 
             match get_field_type(field) {
@@ -131,14 +131,14 @@ pub fn parse(
   let enum_visitors: Tokens = data_enum
     .variants
     .iter()
-    .map(|ref variant| {
+    .map(|variant| {
       match variant.fields {
         Fields::Unit => None,
         Fields::Named(ref fields) => {
           let enum_fields = fields
             .named
             .iter()
-            .map(|ref field| {
+            .map(|field| {
               // let label = field.ident;
               // let label_name = label.unwrap().to_string();
               // let visitor_label = Ident::new(&format!("__Visitor{}", label_name), Span::call_site());
@@ -186,7 +186,7 @@ pub fn parse(
   let match_to_enum: Tokens = data_enum
     .variants
     .iter()
-    .map(|ref variant| {
+    .map(|variant| {
       let field_attrs = YaSerdeAttribute::parse(&variant.attrs);
       let renamed_label = match field_attrs.rename {
         Some(value) => Ident::new(&format!("{}", value), Span::call_site()),
diff --git a/yaserde_derive/src/de/expand_struct.rs b/yaserde_derive/src/de/expand_struct.rs
index 3fd1b08..9f876a7 100644
--- a/yaserde_derive/src/de/expand_struct.rs
+++ b/yaserde_derive/src/de/expand_struct.rs
@@ -14,7 +14,7 @@ pub fn parse(
 ) -> Tokens {
   let validate_namespace: Tokens = namespaces
     .iter()
-    .map(|(ref _prefix, ref namespace)| {
+    .map(|(_prefix, namespace)| {
       Some(quote!(
 
         let mut found = false;
@@ -39,7 +39,7 @@ pub fn parse(
   let variables: Tokens = data_struct
     .fields
     .iter()
-    .map(|ref field| {
+    .map(|field| {
       let label = field.ident;
       match get_field_type(field) {
         Some(FieldType::FieldTypeString) => {
@@ -118,7 +118,7 @@ pub fn parse(
   let field_visitors: Tokens = data_struct
     .fields
     .iter()
-    .map(|ref field| {
+    .map(|field| {
       let field_attrs = YaSerdeAttribute::parse(&field.attrs);
       let label_name = if let Some(value) = field_attrs.rename {
         Ident::new(&format!("{}", value), Span::call_site()).to_string()
@@ -259,7 +259,7 @@ pub fn parse(
   let call_visitors: Tokens = data_struct
     .fields
     .iter()
-    .map(|ref field| {
+    .map(|field| {
       let field_attrs = YaSerdeAttribute::parse(&field.attrs);
       let label = field.ident;
 
@@ -546,7 +546,7 @@ pub fn parse(
   let attributes_loading: Tokens = data_struct
     .fields
     .iter()
-    .map(|ref field| {
+    .map(|field| {
       let field_attrs = YaSerdeAttribute::parse(&field.attrs);
       if !field_attrs.attribute {
         return None;
@@ -598,7 +598,7 @@ pub fn parse(
   let set_text: Tokens = data_struct
     .fields
     .iter()
-    .map(|ref field| {
+    .map(|field| {
       let label = field.ident;
       let field_attrs = YaSerdeAttribute::parse(&field.attrs);
 
@@ -667,7 +667,7 @@ pub fn parse(
   let struct_builder: Tokens = data_struct
     .fields
     .iter()
-    .map(|ref field| {
+    .map(|field| {
       let label = field.ident;
 
       if get_field_type(field).is_some() {
diff --git a/yaserde_derive/src/de/mod.rs b/yaserde_derive/src/de/mod.rs
index 091d31d..8c81ded 100644
--- a/yaserde_derive/src/de/mod.rs
+++ b/yaserde_derive/src/de/mod.rs
@@ -12,15 +12,15 @@ pub fn expand_derive_deserialize(ast: &syn::DeriveInput) -> Result<quote::Tokens
   let attrs = &ast.attrs;
   let data = &ast.data;
 
-  let root_attrs = attribute::YaSerdeAttribute::parse(&attrs);
+  let root_attrs = attribute::YaSerdeAttribute::parse(attrs);
   let root = root_attrs.clone().root.unwrap_or_else(|| name.to_string());
 
   let impl_block = match *data {
     syn::Data::Struct(ref data_struct) => {
-      expand_struct::parse(data_struct, &name, &root, &root_attrs.namespaces)
+      expand_struct::parse(data_struct, name, &root, &root_attrs.namespaces)
     }
     syn::Data::Enum(ref data_enum) => {
-      expand_enum::parse(data_enum, &name, &root, &root_attrs.namespaces)
+      expand_enum::parse(data_enum, name, &root, &root_attrs.namespaces)
     }
     syn::Data::Union(ref _data_union) => unimplemented!(),
   };
diff --git a/yaserde_derive/src/ser/expand_enum.rs b/yaserde_derive/src/ser/expand_enum.rs
index d66829e..86ea761 100644
--- a/yaserde_derive/src/ser/expand_enum.rs
+++ b/yaserde_derive/src/ser/expand_enum.rs
@@ -16,7 +16,7 @@ pub fn serialize(
   let write_enum_content: Tokens = data_enum
     .variants
     .iter()
-    .map(|ref variant| {
+    .map(|variant| {
       let variant_attrs = YaSerdeAttribute::parse(&variant.attrs);
       let renamed_label = match variant_attrs.rename {
         Some(value) => Ident::new(&format!("{}", value), Span::call_site()),
@@ -40,7 +40,7 @@ pub fn serialize(
           let enum_fields = fields
             .named
             .iter()
-            .map(|ref field| {
+            .map(|field| {
               let field_attrs = YaSerdeAttribute::parse(&field.attrs);
               if field_attrs.attribute {
                 return None;
@@ -145,7 +145,7 @@ pub fn serialize(
 
   let add_namespaces: Tokens = namespaces
     .iter()
-    .map(|(ref prefix, ref namespace)| {
+    .map(|(prefix, namespace)| {
       Some(quote!(
         .ns(#prefix, #namespace)
       ))
diff --git a/yaserde_derive/src/ser/expand_struct.rs b/yaserde_derive/src/ser/expand_struct.rs
index 465145a..298a570 100644
--- a/yaserde_derive/src/ser/expand_struct.rs
+++ b/yaserde_derive/src/ser/expand_struct.rs
@@ -16,7 +16,7 @@ pub fn serialize(
   let build_attributes: Tokens = data_struct
     .fields
     .iter()
-    .map(|ref field| {
+    .map(|field| {
       let field_attrs = YaSerdeAttribute::parse(&field.attrs);
       if !field_attrs.attribute {
         return None;
@@ -73,7 +73,7 @@ pub fn serialize(
 
   let add_namespaces: Tokens = namespaces
     .iter()
-    .map(|(ref prefix, ref namespace)| {
+    .map(|(prefix, namespace)| {
       Some(quote!(
         .ns(#prefix, #namespace)
       ))
@@ -88,7 +88,7 @@ pub fn serialize(
   let struct_inspector: Tokens = data_struct
     .fields
     .iter()
-    .map(|ref field| {
+    .map(|field| {
       let field_attrs = YaSerdeAttribute::parse(&field.attrs);
       if field_attrs.attribute {
         return None;
diff --git a/yaserde_derive/src/ser/mod.rs b/yaserde_derive/src/ser/mod.rs
index 2929b1f..b943eca 100644
--- a/yaserde_derive/src/ser/mod.rs
+++ b/yaserde_derive/src/ser/mod.rs
@@ -12,7 +12,7 @@ pub fn expand_derive_serialize(ast: &syn::DeriveInput) -> Result<quote::Tokens,
   let attrs = &ast.attrs;
   let data = &ast.data;
 
-  let root_attrs = attribute::YaSerdeAttribute::parse(&attrs);
+  let root_attrs = attribute::YaSerdeAttribute::parse(attrs);
   let root = root_attrs.clone().root.unwrap_or_else(|| name.to_string());
 
   let root = if let Some(prefix) = root_attrs.prefix {
@@ -23,10 +23,10 @@ pub fn expand_derive_serialize(ast: &syn::DeriveInput) -> Result<quote::Tokens,
 
   let impl_block = match *data {
     syn::Data::Struct(ref data_struct) => {
-      expand_struct::serialize(data_struct, &name, &root, &root_attrs.namespaces)
+      expand_struct::serialize(data_struct, name, &root, &root_attrs.namespaces)
     }
     syn::Data::Enum(ref data_enum) => {
-      expand_enum::serialize(data_enum, &name, &root, &root_attrs.namespaces)
+      expand_enum::serialize(data_enum, name, &root, &root_attrs.namespaces)
     }
     syn::Data::Union(ref _data_union) => unimplemented!(),
   };