diff --git a/src/main.rs b/src/main.rs
index 9a02b2b..56efa47 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,5 @@
+#![forbid(unsafe_code)]
+
 use std::fs::File;
 use std::io::BufWriter;