diff --git a/README.md b/README.md
index 614a404..835943b 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 # cox
 [![Build Status](https://travis-ci.org/didactic-drunk/cox.svg?branch=master)](https://travis-ci.org/didactic-drunk/cox)
+[![Docs](https://img.shields.io/badge/docs-available-brightgreen.svg)](https://didactic-drunk.github.io/cox/)
 
 Updated Crystal bindings for the [libsodium API](https://libsodium.gitbook.io/doc/)
 
diff --git a/src/cox/pwhash.cr b/src/cox/pwhash.cr
index 50dece1..815284a 100644
--- a/src/cox/pwhash.cr
+++ b/src/cox/pwhash.cr
@@ -2,6 +2,8 @@ module Cox
   # [Argon2 Password Hashing](https://libsodium.gitbook.io/doc/password_hashing/the_argon2i_function)
   # * #store #verify #needs_rehash? are used together for password verification.
   # * #key_derive is used on it's own to generate password based keys.
+  #
+  # See `examples/pwhash_selector.cr` for help on selecting parameters.
   class Pwhash
     class PasswordVerifyError < Cox::Error
     end
@@ -16,6 +18,7 @@ module Cox
     MEMLIMIT_MAX         = LibSodium.crypto_pwhash_memlimit_max
     MEMLIMIT_INTERACTIVE = LibSodium.crypto_pwhash_memlimit_interactive
 
+    # Use the most recent algorithm Argon2id13 for new applications.
     enum Algorithm
       Argon2i13  = 1
       Argon2id13 = 2