diff --git a/examples/simple_app/lib/simple_app/typed_struct_example.ex b/examples/simple_app/lib/simple_app/typed_struct_example.ex
new file mode 100644
index 00000000..91f91bcd
--- /dev/null
+++ b/examples/simple_app/lib/simple_app/typed_struct_example.ex
@@ -0,0 +1,28 @@
+defmodule Shared.Data.Authorization do
+  @moduledoc """
+  Saves authorization details for a user. It also contains other details.
+  """
+
+  use TypedStruct
+
+  alias Shared.Utils.Structs
+
+  @type authorization :: %{
+          (cookie :: String.t()) => String.t(),
+          (token :: String.t()) => String.t()
+        }
+
+  @derive Jason.Encoder
+  typedstruct enforce: true do
+    @typedoc "Authorization information for a user"
+
+    field(:cookie, String.t())
+    field(:token, String.t())
+  end
+
+  @spec new(authorization()) :: __MODULE__.t()
+  def new(%{"cookie" => cookie, "token" => token} = auth)
+      when is_binary(cookie) and is_binary(token) do
+    Structs.string_map_to_struct(auth, __MODULE__)
+  end
+end
diff --git a/examples/simple_app/mix.exs b/examples/simple_app/mix.exs
index 4a472d38..15b3a423 100644
--- a/examples/simple_app/mix.exs
+++ b/examples/simple_app/mix.exs
@@ -20,6 +20,10 @@ defmodule SimpleApp.MixProject do
 
   # Run "mix help deps" to learn about dependencies.
   defp deps do
-    [{:gradient, path: "../../"}]
+    [
+      {:jason, "~> 1.4"},
+      {:typed_struct, "~> 0.3.0"},
+      {:gradient, path: "../../"}
+    ]
   end
 end
diff --git a/examples/simple_app/mix.lock b/examples/simple_app/mix.lock
index fa63b4f3..10c25044 100644
--- a/examples/simple_app/mix.lock
+++ b/examples/simple_app/mix.lock
@@ -1,3 +1,6 @@
 %{
-  "gradualizer": {:git, "https://github.com/josefs/Gradualizer.git", "6e89b4e1cd489637a848cc5ca55058c8a241bf7d", [ref: "6e89b4e"]},
+  "gradient_macros": {:git, "https://github.com/esl/gradient_macros.git", "bf5a066a6abd90cc63281d7ccb8eb7ac0fed0e64", [ref: "bf5a066"]},
+  "gradualizer": {:git, "https://github.com/josefs/Gradualizer.git", "1498d1792155010950c86dc3e92ccb111b706e80", [ref: "1498d17"]},
+  "jason": {:hex, :jason, "1.4.0", "e855647bc964a44e2f67df589ccf49105ae039d4179db7f6271dfd3843dc27e6", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "79a3791085b2a0f743ca04cec0f7be26443738779d09302e01318f97bdb82121"},
+  "typed_struct": {:hex, :typed_struct, "0.3.0", "939789e3c1dca39d7170c87f729127469d1315dcf99fee8e152bb774b17e7ff7", [:mix], [], "hexpm", "c50bd5c3a61fe4e198a8504f939be3d3c85903b382bde4865579bc23111d1b6d"},
 }