diff --git a/.hound.yml b/.hound.yml
new file mode 100644
index 0000000..f283ada
--- /dev/null
+++ b/.hound.yml
@@ -0,0 +1,2 @@
+credo:
+  enabled: true
diff --git a/lib/chess.ex b/lib/chess.ex
index 75097e7..923ec2f 100644
--- a/lib/chess.ex
+++ b/lib/chess.ex
@@ -1,4 +1,6 @@
 defmodule Chess do
+  @moduledoc false
+
   use Application
 
   # See http://elixir-lang.org/docs/stable/elixir/Application.html
diff --git a/lib/chess/auth.ex b/lib/chess/auth.ex
index 44a0c39..4b22712 100644
--- a/lib/chess/auth.ex
+++ b/lib/chess/auth.ex
@@ -105,10 +105,11 @@ defmodule Chess.Auth do
 
   @doc false
   def authenticate_user(username, password) do
-    Repo.one(
-      from u in User,
-      where: u.username == ^username
-    )
+    query = from u in User,
+            where: u.username == ^username
+
+    query
+    |> Repo.one
     |> Argon2.check_pass(password)
   end
 end
diff --git a/lib/chess/auth/guardian.ex b/lib/chess/auth/guardian.ex
index 7af60b8..5b4fef9 100644
--- a/lib/chess/auth/guardian.ex
+++ b/lib/chess/auth/guardian.ex
@@ -1,4 +1,6 @@
 defmodule Chess.Auth.Guardian do
+  @moduledoc false
+
   use Guardian, otp_app: :chess
 
   alias Chess.Auth
diff --git a/lib/chess/board.ex b/lib/chess/board.ex
index 341a453..b4c9faa 100644
--- a/lib/chess/board.ex
+++ b/lib/chess/board.ex
@@ -1,4 +1,6 @@
 defmodule Chess.Board do
+  @moduledoc false
+
   def output(board) do
     Enum.map(0..7, fn (rank) ->
       Enum.map(0..7, fn (file) ->
diff --git a/lib/chess/store/game.ex b/lib/chess/store/game.ex
index d3e66ac..6db4ba5 100644
--- a/lib/chess/store/game.ex
+++ b/lib/chess/store/game.ex
@@ -1,4 +1,6 @@
 defmodule Chess.Store.Game do
+  @moduledoc false
+
   use Ecto.Schema
   use Timex.Ecto.Timestamps
 
diff --git a/lib/chess_web/controllers/game_controller.ex b/lib/chess_web/controllers/game_controller.ex
index 4420783..b12519f 100644
--- a/lib/chess_web/controllers/game_controller.ex
+++ b/lib/chess_web/controllers/game_controller.ex
@@ -5,10 +5,12 @@ defmodule ChessWeb.GameController do
 
   def index(conn, _params) do
     changeset = Game.changeset(%Game{})
-    games = Game
-            |> Game.for_user(current_user(conn))
-            |> Game.ordered
-            |> Repo.all
+    games =
+      Game
+      |> Game.for_user(current_user(conn))
+      |> Game.ordered
+      |> Repo.all
+
     render(conn, "index.html", games: games, changeset: changeset)
   end
 
@@ -30,6 +32,7 @@ defmodule ChessWeb.GameController do
 
   def show(conn, %{"id" => id}) do
     game = Repo.get!(Game, id)
+
     render(conn, "show.html", game: game)
   end