diff --git a/src/lib.rs b/src/lib.rs
index 22cd7e9..8f586ec 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -234,6 +234,7 @@
 #![no_std]
 #![warn(future_incompatible)]
 #![deny(missing_docs)] // refuse to compile if documentation is missing
+#![forbid(unsafe_code)]
 
 #[cfg(any(feature = "std", test))]
 #[macro_use]