diff --git a/examples/wasm-in-wasm/Cargo.toml b/examples/wasm-in-wasm/Cargo.toml
index 1f141ad5..491247c8 100644
--- a/examples/wasm-in-wasm/Cargo.toml
+++ b/examples/wasm-in-wasm/Cargo.toml
@@ -2,6 +2,7 @@
 name = "wasm-in-wasm"
 version = "0.1.0"
 authors = ["The wasm-bindgen Developers"]
+edition = "2018"
 
 [lib]
 crate-type = ["cdylib"]
diff --git a/examples/wasm-in-wasm/src/lib.rs b/examples/wasm-in-wasm/src/lib.rs
index 2aecb909..1fa56668 100644
--- a/examples/wasm-in-wasm/src/lib.rs
+++ b/examples/wasm-in-wasm/src/lib.rs
@@ -1,6 +1,3 @@
-extern crate js_sys;
-extern crate wasm_bindgen;
-
 use js_sys::{Function, Object, Reflect, Uint8Array, WebAssembly};
 use wasm_bindgen::prelude::*;
 use wasm_bindgen::JsCast;