diff --git a/instant-xml-macros/src/case.rs b/instant-xml-macros/src/case.rs
index aeef600..516a0b9 100644
--- a/instant-xml-macros/src/case.rs
+++ b/instant-xml-macros/src/case.rs
@@ -5,7 +5,6 @@
 // See https://users.rust-lang.org/t/psa-dealing-with-warning-unused-import-std-ascii-asciiext-in-today-s-nightly/13726
 #[allow(deprecated, unused_imports)]
 use std::ascii::AsciiExt;
-
 use std::fmt::{self, Debug, Display};
 
 use proc_macro2::Ident;
diff --git a/instant-xml-macros/src/ser.rs b/instant-xml-macros/src/ser.rs
index 0516eb1..f09cf5f 100644
--- a/instant-xml-macros/src/ser.rs
+++ b/instant-xml-macros/src/ser.rs
@@ -5,7 +5,8 @@ use quote::quote;
 use syn::spanned::Spanned;
 
 use super::{discard_lifetimes, meta_items, ContainerMeta, FieldMeta, Mode, VariantMeta};
-use crate::{case::RenameRule, Namespace};
+use crate::case::RenameRule;
+use crate::Namespace;
 
 pub fn to_xml(input: &syn::DeriveInput) -> proc_macro2::TokenStream {
     let meta = match ContainerMeta::from_derive(input) {
diff --git a/instant-xml/benches/decode.rs b/instant-xml/benches/decode.rs
index e35c0ae..1f1fd8b 100644
--- a/instant-xml/benches/decode.rs
+++ b/instant-xml/benches/decode.rs
@@ -1,7 +1,6 @@
 use std::borrow::Cow;
 
-use bencher::Bencher;
-use bencher::{benchmark_group, benchmark_main};
+use bencher::{benchmark_group, benchmark_main, Bencher};
 use instant_xml::{from_str, FromXml};
 
 fn decode_short_ascii(bench: &mut Bencher) {
diff --git a/instant-xml/src/impls.rs b/instant-xml/src/impls.rs
index 7683a22..ad8b59e 100644
--- a/instant-xml/src/impls.rs
+++ b/instant-xml/src/impls.rs
@@ -1,9 +1,9 @@
+use std::any::type_name;
 use std::borrow::Cow;
-use std::fmt;
+use std::marker::PhantomData;
 use std::net::IpAddr;
-use std::str;
 use std::str::FromStr;
-use std::{any::type_name, marker::PhantomData};
+use std::{fmt, str};
 
 #[cfg(feature = "chrono")]
 use chrono::{DateTime, NaiveDate, Utc};
diff --git a/instant-xml/src/lib.rs b/instant-xml/src/lib.rs
index e31685a..b6519fb 100644
--- a/instant-xml/src/lib.rs
+++ b/instant-xml/src/lib.rs
@@ -1,8 +1,8 @@
-use std::{borrow::Cow, fmt};
-
-use thiserror::Error;
+use std::borrow::Cow;
+use std::fmt;
 
 pub use macros::{FromXml, ToXml};
+use thiserror::Error;
 
 #[doc(hidden)]
 pub mod de;
diff --git a/instant-xml/tests/attr-no-ns.rs b/instant-xml/tests/attr-no-ns.rs
index 759318c..26ad74f 100644
--- a/instant-xml/tests/attr-no-ns.rs
+++ b/instant-xml/tests/attr-no-ns.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, to_string, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, FromXml, PartialEq, ToXml)]
 struct Basic {
diff --git a/instant-xml/tests/chrono.rs b/instant-xml/tests/chrono.rs
index c1081e1..210871e 100644
--- a/instant-xml/tests/chrono.rs
+++ b/instant-xml/tests/chrono.rs
@@ -1,9 +1,8 @@
 #![cfg(feature = "chrono")]
 
 use chrono::{DateTime, TimeZone, Utc};
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, to_string, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, PartialEq, FromXml, ToXml)]
 struct Test {
diff --git a/instant-xml/tests/de-direct.rs b/instant-xml/tests/de-direct.rs
index e3ec9f0..9c4c801 100644
--- a/instant-xml/tests/de-direct.rs
+++ b/instant-xml/tests/de-direct.rs
@@ -1,8 +1,7 @@
 use std::borrow::Cow;
 
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, Error, FromXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, PartialEq, FromXml)]
 #[xml(ns("URI"))]
diff --git a/instant-xml/tests/de-nested.rs b/instant-xml/tests/de-nested.rs
index 196d148..37336d3 100644
--- a/instant-xml/tests/de-nested.rs
+++ b/instant-xml/tests/de-nested.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, FromXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, PartialEq, FromXml)]
 #[xml(ns("URI", bar = BAR))]
diff --git a/instant-xml/tests/de-ns.rs b/instant-xml/tests/de-ns.rs
index 7f11f4a..b9fe8a8 100644
--- a/instant-xml/tests/de-ns.rs
+++ b/instant-xml/tests/de-ns.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, Error, FromXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, PartialEq, FromXml)]
 struct NestedWrongNamespace {
diff --git a/instant-xml/tests/direct.rs b/instant-xml/tests/direct.rs
index 17e1f28..836b14a 100644
--- a/instant-xml/tests/direct.rs
+++ b/instant-xml/tests/direct.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, to_string, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Clone, Debug, Eq, FromXml, PartialEq, ToXml)]
 struct Foo {
diff --git a/instant-xml/tests/escaping.rs b/instant-xml/tests/escaping.rs
index 4d3de50..55c9dab 100644
--- a/instant-xml/tests/escaping.rs
+++ b/instant-xml/tests/escaping.rs
@@ -1,8 +1,7 @@
 use std::borrow::Cow;
 
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, to_string, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, PartialEq, Eq, FromXml, ToXml)]
 #[xml(ns("URI"))]
diff --git a/instant-xml/tests/forward-enum.rs b/instant-xml/tests/forward-enum.rs
index 5fb092a..a3d81e9 100644
--- a/instant-xml/tests/forward-enum.rs
+++ b/instant-xml/tests/forward-enum.rs
@@ -1,8 +1,7 @@
 use std::borrow::Cow;
 
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, to_string, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, FromXml, PartialEq, ToXml)]
 #[xml(forward)]
diff --git a/instant-xml/tests/generics.rs b/instant-xml/tests/generics.rs
index 8e123d9..4064f67 100644
--- a/instant-xml/tests/generics.rs
+++ b/instant-xml/tests/generics.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, to_string, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, FromXml, ToXml, PartialEq)]
 struct Foo<T> {
diff --git a/instant-xml/tests/lifetime.rs b/instant-xml/tests/lifetime.rs
index 3f0bf41..4800ca2 100644
--- a/instant-xml/tests/lifetime.rs
+++ b/instant-xml/tests/lifetime.rs
@@ -1,8 +1,7 @@
 use std::borrow::Cow;
 
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, to_string, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, FromXml, PartialEq, ToXml)]
 struct Foo {
diff --git a/instant-xml/tests/option.rs b/instant-xml/tests/option.rs
index 5a597a2..f49c438 100644
--- a/instant-xml/tests/option.rs
+++ b/instant-xml/tests/option.rs
@@ -1,8 +1,7 @@
 use std::borrow::Cow;
 
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, to_string, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, FromXml, PartialEq, ToXml)]
 struct Foo {
diff --git a/instant-xml/tests/rename.rs b/instant-xml/tests/rename.rs
index dd38774..2792014 100644
--- a/instant-xml/tests/rename.rs
+++ b/instant-xml/tests/rename.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, to_string, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, PartialEq, FromXml, ToXml)]
 #[xml(rename = "renamed")]
diff --git a/instant-xml/tests/scalar-enum.rs b/instant-xml/tests/scalar-enum.rs
index 9ffc10a..8e215ca 100644
--- a/instant-xml/tests/scalar-enum.rs
+++ b/instant-xml/tests/scalar-enum.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, to_string, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, FromXml, PartialEq, ToXml)]
 #[xml(scalar)]
diff --git a/instant-xml/tests/scalar.rs b/instant-xml/tests/scalar.rs
index 4f6acf0..2b7387c 100644
--- a/instant-xml/tests/scalar.rs
+++ b/instant-xml/tests/scalar.rs
@@ -1,8 +1,7 @@
 use std::borrow::Cow;
 
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, PartialEq, Eq, FromXml, ToXml)]
 #[xml(ns("URI"))]
diff --git a/instant-xml/tests/ser-attr-ns.rs b/instant-xml/tests/ser-attr-ns.rs
index 603bb3f..b178972 100644
--- a/instant-xml/tests/ser-attr-ns.rs
+++ b/instant-xml/tests/ser-attr-ns.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{to_string, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(ToXml)]
 #[xml(ns(bar = "BAR"))]
diff --git a/instant-xml/tests/ser-child-ns.rs b/instant-xml/tests/ser-child-ns.rs
index afcc97b..2b122bd 100644
--- a/instant-xml/tests/ser-child-ns.rs
+++ b/instant-xml/tests/ser-child-ns.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{to_string, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, PartialEq, ToXml)]
 #[xml(ns(dar = "BAZ", internal = INTERNAL))]
diff --git a/instant-xml/tests/ser-named.rs b/instant-xml/tests/ser-named.rs
index cd25283..3ab090c 100644
--- a/instant-xml/tests/ser-named.rs
+++ b/instant-xml/tests/ser-named.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{to_string, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, PartialEq, ToXml)]
 #[xml(ns(bar = "BAZ", foo = "BAR"))]
diff --git a/instant-xml/tests/ser-nested.rs b/instant-xml/tests/ser-nested.rs
index 2185dc2..bf291a7 100644
--- a/instant-xml/tests/ser-nested.rs
+++ b/instant-xml/tests/ser-nested.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{to_string, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, PartialEq, ToXml)]
 #[xml(ns("URI", dar = "BAZ", internal = INTERNAL))]
diff --git a/instant-xml/tests/ser-unit.rs b/instant-xml/tests/ser-unit.rs
index 5ac8408..abdb53a 100644
--- a/instant-xml/tests/ser-unit.rs
+++ b/instant-xml/tests/ser-unit.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{to_string, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, PartialEq, ToXml)]
 struct Unit;
diff --git a/instant-xml/tests/transparent.rs b/instant-xml/tests/transparent.rs
index 15aee7e..a364a29 100644
--- a/instant-xml/tests/transparent.rs
+++ b/instant-xml/tests/transparent.rs
@@ -1,8 +1,7 @@
 use std::borrow::Cow;
 
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, to_string, Error, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, FromXml, PartialEq, ToXml)]
 struct Wrapper {
diff --git a/instant-xml/tests/unnamed.rs b/instant-xml/tests/unnamed.rs
index 6e3782e..8bc2444 100644
--- a/instant-xml/tests/unnamed.rs
+++ b/instant-xml/tests/unnamed.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, to_string, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, FromXml, PartialEq, ToXml)]
 struct OneNumber(i32);
diff --git a/instant-xml/tests/vec.rs b/instant-xml/tests/vec.rs
index d097aa3..efd0070 100644
--- a/instant-xml/tests/vec.rs
+++ b/instant-xml/tests/vec.rs
@@ -1,6 +1,5 @@
-use similar_asserts::assert_eq;
-
 use instant_xml::{from_str, to_string, FromXml, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(Debug, Eq, FromXml, PartialEq, ToXml)]
 struct Foo {
diff --git a/instant-xml/tests/with.rs b/instant-xml/tests/with.rs
index f9efbf8..605a73f 100644
--- a/instant-xml/tests/with.rs
+++ b/instant-xml/tests/with.rs
@@ -1,8 +1,7 @@
 use std::fmt;
 
-use similar_asserts::assert_eq;
-
 use instant_xml::{to_string, Error, Serializer, ToXml};
+use similar_asserts::assert_eq;
 
 #[derive(ToXml)]
 struct Foo {
diff --git a/rustfmt.toml b/rustfmt.toml
new file mode 100644
index 0000000..4e14834
--- /dev/null
+++ b/rustfmt.toml
@@ -0,0 +1,3 @@
+# Imports
+group_imports = "StdExternalCrate"
+imports_granularity = "Module"