diff --git a/examples/webaudio/Cargo.toml b/examples/webaudio/Cargo.toml
index 23a4abbc7..1d71c198e 100644
--- a/examples/webaudio/Cargo.toml
+++ b/examples/webaudio/Cargo.toml
@@ -2,6 +2,7 @@
 name = "webaudio"
 version = "0.1.0"
 authors = ["The wasm-bindgen Developers"]
+edition = "2018"
 
 [lib]
 crate-type = ["cdylib"]
diff --git a/examples/webaudio/src/lib.rs b/examples/webaudio/src/lib.rs
index 0926ef211..c4f847944 100644
--- a/examples/webaudio/src/lib.rs
+++ b/examples/webaudio/src/lib.rs
@@ -1,6 +1,3 @@
-extern crate wasm_bindgen;
-extern crate web_sys;
-
 use wasm_bindgen::prelude::*;
 use web_sys::{AudioContext, OscillatorType};