diff --git a/clippy_dev/Cargo.toml b/clippy_dev/Cargo.toml
index 503dd53aa..519f78999 100644
--- a/clippy_dev/Cargo.toml
+++ b/clippy_dev/Cargo.toml
@@ -1,7 +1,10 @@
+cargo-features = ["edition"]
+
 [package]
 name = "clippy_dev"
 version = "0.0.1"
 authors = ["Philipp Hansch <dev@phansch.net>"]
+edition = "2018"
 
 [dependencies]
 clap = "~2.32"
diff --git a/clippy_dev/src/lib.rs b/clippy_dev/src/lib.rs
index f10ad81d1..e5ce8580f 100644
--- a/clippy_dev/src/lib.rs
+++ b/clippy_dev/src/lib.rs
@@ -1,12 +1,9 @@
 #![feature(tool_lints)]
 #![allow(clippy::default_hash_types)]
-extern crate regex;
-#[macro_use]
-extern crate lazy_static;
-extern crate itertools;
 
-use regex::Regex;
 use itertools::Itertools;
+use lazy_static::lazy_static;
+use regex::Regex;
 use std::collections::HashMap;
 use std::ffi::OsStr;
 use std::fs;