diff --git a/lib/chess/repo.ex b/lib/chess/repo.ex
index b4561db..2bd2bdf 100644
--- a/lib/chess/repo.ex
+++ b/lib/chess/repo.ex
@@ -1,3 +1,3 @@
 defmodule Chess.Repo do
-  use Ecto.Repo, otp_app: :chess
+  use Ecto.Repo, otp_app: :chess, adapter: Ecto.Adapters.Postgres
 end
diff --git a/lib/chess/store/game.ex b/lib/chess/store/game.ex
index d7a67f4..9610821 100644
--- a/lib/chess/store/game.ex
+++ b/lib/chess/store/game.ex
@@ -2,7 +2,6 @@ defmodule Chess.Store.Game do
   @moduledoc false
 
   use Ecto.Schema
-  use Timex.Ecto.Timestamps
 
   import Ecto.Changeset
   import Ecto.Query
diff --git a/lib/chess/store/move.ex b/lib/chess/store/move.ex
index 9c560b6..2690b25 100644
--- a/lib/chess/store/move.ex
+++ b/lib/chess/store/move.ex
@@ -2,7 +2,6 @@ defmodule Chess.Store.Move do
   @moduledoc false
 
   use Ecto.Schema
-  use Timex.Ecto.Timestamps
 
   import Ecto.Changeset
 
diff --git a/lib/chess_web/endpoint.ex b/lib/chess_web/endpoint.ex
index b93a5a5..c3a1d69 100644
--- a/lib/chess_web/endpoint.ex
+++ b/lib/chess_web/endpoint.ex
@@ -33,7 +33,7 @@ defmodule ChessWeb.Endpoint do
   plug Plug.Parsers,
     parsers: [:urlencoded, :multipart, :json],
     pass: ["*/*"],
-    json_decoder: Poison
+    json_decoder: Jason
 
   plug Plug.MethodOverride
   plug Plug.Head