diff --git a/README.md b/README.md
index cad4e5a..d1d227a 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,7 @@ go get github.com/vadv/gopher-lua-libs
 * [db](/db) access to databases
 * [filepath](/filepath) path.filepath port
 * [goos](/goos) os port
+* [hex](/hex) Port of [encoding/hex](https://pkg.go.dev/encoding/hex)
 * [http](/http) http.client && http.server
 * [humanize](/humanize) humanize [github.com/dustin/go-humanize](https://github.com/dustin/go-humanize) port
 * [inspect](/inspect) pretty print [github.com/kikito/inspect.lua](https://github.com/kikito/inspect.lua)
diff --git a/hex/README.md b/hex/README.md
index cdfa2d5..a512dc8 100644
--- a/hex/README.md
+++ b/hex/README.md
@@ -9,21 +9,9 @@ Lua module for [encoding/hex](https://pkg.go.dev/encoding/hex)
 ```lua
 local hex = require("hex")
 
-s = hex.RawStdEncoding:encode_to_string("foo\01bar")
+s = hex:encode_to_string("foo\01bar")
 print(s)
-Zm9vAWJhcg
-
-s = hex.StdEncoding:encode_to_string("foo\01bar")
-print(s)
-Zm9vAWJhcg==
-
-s = hex.RawURLEncoding:encode_to_string("this is a <tag> and should be encoded")
-print(s)
-dGhpcyBpcyBhIDx0YWc-IGFuZCBzaG91bGQgYmUgZW5jb2RlZA
-
-s = hex.URLEncoding:encode_to_string("this is a <tag> and should be encoded")
-print(s)
-dGhpcyBpcyBhIDx0YWc-IGFuZCBzaG91bGQgYmUgZW5jb2RlZA==
+666f6f01626172
 
 ```
 
@@ -32,12 +20,12 @@ dGhpcyBpcyBhIDx0YWc-IGFuZCBzaG91bGQgYmUgZW5jb2RlZA==
 ```lua
 local hex = require 'hex'
 
-decoded, err = hex.decode_string("666f6f62617262617a")
+decoded, err = hex.decode_string("666f6f01626172")
 assert(not err, err)
 print(decoded)
 foo
bar
 
 encoded = hex.encode_to_string(decoded)
 print(encoded)
-666f6f62617262617a
+666f6f01626172
 ```