diff --git a/src/lib.rs b/src/lib.rs
index 5f65d77..4c2364a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -24,7 +24,7 @@
 
 #![no_std]
 #![allow(non_upper_case_globals)]
-#![forbid(unsafe_code, rust_2018_idioms)]
+#![deny(unsafe_code, rust_2018_idioms)]
 
 use core::char;
 use core::fmt;