diff --git a/rust_bindings/src/lib.rs b/rust_bindings/src/lib.rs
index 609eb41..acefb70 100644
--- a/rust_bindings/src/lib.rs
+++ b/rust_bindings/src/lib.rs
@@ -1,3 +1,11 @@
+//! Hasthree rust bindings
+//!
+//! hashtree is a SHA256 library highly optimized for Merkle tree computations. It is based on
+//! Intel's implementation (intel-ipsec-mb) with a few modifications like hardcoding the scheduled
+//! words. This library exposes a single function that takes an input slice of bytes to be
+//! considered as chunks of 64 bytes each, and another slice where the digests of each chunk will
+//! be written consecutively
+//!
 extern crate libc;
 use libc::c_int;
 use std::ptr;