diff --git a/src/lib.rs b/src/lib.rs
index 1f9c6d8..4171cfe 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,14 @@
 //! Gemini client and server implementaion in async Rust with Tokio and Rustls.
-//! You probably need [`Client::builder()`]
+//! You probably need [`Client::builder()`].
+//!
+//! # Features
+//! - `file-sscv`: known_hosts file parser and
+//!   helper functions for verifying a self-signed certificate.
+//! - `dane`: alias to `hickory`.
+//! - `hickory`: custom DNS client, also required for
+//!   a DANE-based verification.
+//! - `hickory-dot`: enables DNS-over-TLS.
+//! - `hickory-doh`: enables DNS-over-HTTPS.
 
 pub mod certs;
 pub mod client;