diff --git a/src/lib.rs b/src/lib.rs
index 449cf78..2090acb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -81,6 +81,8 @@
 //! | `sha`      | Enable support for the Sha1, Sha256 and Sha512 hasher         | `sha` and `sha2`                          | yes     |
 //! | `jwt`      | Enable support for the Json Web Token utils                   | `chrono`, `serde` and `jsonwebtoken`      | yes     |
 
+#![warn(missing_docs)]
+
 #[cfg(feature = "jwt")]
 pub mod jsonwebtoken;
 #[cfg(feature = "sha")]
diff --git a/src/sha.rs b/src/sha.rs
index b95df1d..5d6893e 100644
--- a/src/sha.rs
+++ b/src/sha.rs
@@ -22,8 +22,11 @@ use sha2::{Sha256, Sha512};
 /// Hashing algorithms
 #[derive(Debug)]
 pub enum Algorithm {
+    /// [SHA-1](https://en.wikipedia.org/wiki/SHA-1)
     SHA1,
+    /// [SHA-256](https://en.wikipedia.org/wiki/SHA-2)
     SHA256,
+    /// [SHA-512](https://en.wikipedia.org/wiki/SHA-2)
     SHA512,
 }