diff --git a/src/de.rs b/src/de.rs
index 0022791..13a3d90 100644
--- a/src/de.rs
+++ b/src/de.rs
@@ -470,7 +470,7 @@ impl<'a> de::Deserializer for ValueDeserializer<'a> {
         where V: de::Visitor,
     {
         if name == SERDE_STRUCT_NAME && fields == &[SERDE_STRUCT_FIELD_NAME] {
-            if let Value::Datetime(ref s) = self.value {
+            if let Value::Datetime(s) = self.value {
                 return visitor.visit_map(DatetimeDeserializer {
                     date: s,
                     visited: false,
@@ -783,7 +783,7 @@ impl<'a> Deserializer<'a> {
             if suffix != "" {
                 return Err(self.error(start, ErrorKind::NumberInvalid))
             }
-            let (a, b) = self.parse_integer(&after, false, true)?;
+            let (a, b) = self.parse_integer(after, false, true)?;
             fraction = Some(a);
             suffix = b;
         }
diff --git a/src/ser.rs b/src/ser.rs
index bc5f357..8fcf0eb 100644
--- a/src/ser.rs
+++ b/src/ser.rs
@@ -283,7 +283,7 @@ impl<'a> Serializer<'a> {
         if array_of_tables {
             self.dst.push_str("[");
         }
-        self.emit_key_part(&state)?;
+        self.emit_key_part(state)?;
         if array_of_tables {
             self.dst.push_str("]");
         }
@@ -586,10 +586,10 @@ impl<'a, 'b> ser::SerializeMap for SerializeTable<'a, 'b> {
                 let res = value.serialize(&mut Serializer {
                     dst: &mut *ser.dst,
                     state: State::Table {
-                        key: &key,
+                        key: key,
                         parent: &ser.state,
-                        first: &first,
-                        table_emitted: &table_emitted,
+                        first: first,
+                        table_emitted: table_emitted,
                     },
                 });
                 match res {