diff --git a/Cargo.toml b/Cargo.toml
index cb3fb29..641d73f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,6 +2,7 @@
 name = "genetisk"
 version = "0.1.0"
 authors = ["logaritmisk <anders.e.olsson@gmail.com>"]
+edition = "2018"
 
 [dependencies]
 rayon = "1.0"
diff --git a/examples/parabole.rs b/examples/parabole.rs
index cd5b76c..00ac31b 100644
--- a/examples/parabole.rs
+++ b/examples/parabole.rs
@@ -1,7 +1,3 @@
-extern crate genetisk;
-extern crate rand;
-extern crate rayon;
-
 use std::cmp::Ordering;
 
 use rand::distributions::{IndependentSample, Range};
diff --git a/src/lib.rs b/src/lib.rs
index 0cea4bf..c8a7ffa 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,4 @@
-extern crate rayon;
-
 use rayon::prelude::*;
-
 pub trait Individual: Send {
     type Fitness: Send + Ord;