diff --git a/src/main.rs b/src/main.rs
index 8504298..70607e2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,6 @@
+#![warn(rust_2018_idioms)]
+#![allow(elided_lifetimes_in_paths)]
+
 use num::Complex;
 
 /// Try to determine if `c` is in the Mandelbrot set, using at most `limit`