diff --git a/guides/working-with-lua.livemd b/guides/working-with-lua.livemd
index 8bf90e1..f36ca3c 100644
--- a/guides/working-with-lua.livemd
+++ b/guides/working-with-lua.livemd
@@ -4,7 +4,7 @@
 
 ```elixir
 Mix.install([
-  {:lua, "~> 0.0.21"}
+  {:lua, "~> 0.0.22"}
 ])
 ```
 
diff --git a/lib/lua/api.ex b/lib/lua/api.ex
index dd6c2a0..4310676 100644
--- a/lib/lua/api.ex
+++ b/lib/lua/api.ex
@@ -97,7 +97,7 @@ defmodule Lua.API do
   @type scope_def :: list(String.t())
 
   @callback scope :: scope_def()
-  @callback install(Lua.t(), scope_def(), any()) :: Lua.t() | String.t()
+  @callback install(Lua.t(), scope_def(), any()) :: Lua.t() | Lua.Chunk.t() | String.t()
   @optional_callbacks [install: 3]
 
   @doc """
diff --git a/mix.exs b/mix.exs
index 3012f32..5993183 100644
--- a/mix.exs
+++ b/mix.exs
@@ -2,7 +2,7 @@ defmodule Lua.MixProject do
   use Mix.Project
 
   @url "https://github.com/tv-labs/lua"
-  @version "0.0.21"
+  @version "0.0.22"
 
   def project do
     [