diff --git a/src/lib.rs b/src/lib.rs
index cbce984..e342c80 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,4 @@
+#![forbid(unsafe_code)]
 #![warn(missing_docs, rust_2018_idioms)]
 //! A macro which makes errors easy to write
 //!