diff --git a/mix.exs b/mix.exs
index 3f55742..f4afa5a 100644
--- a/mix.exs
+++ b/mix.exs
@@ -25,7 +25,7 @@ defmodule OAuth2.Mixfile do
       {:httpoison, "~> 0.6"},
       {:poison, "~> 1.3"},
       {:cowboy, "~> 1.0", only: :test},
-      {:plug, "~> 0.12"},
+      {:plug, "~> 1.0"},
 
       # Docs dependencies
       {:earmark, "~> 0.1", only: :docs},
diff --git a/mix.lock b/mix.lock
index 260b9eb..a80a22a 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,11 +1,11 @@
-%{"cowboy": {:hex, :cowboy, "1.0.0"},
+%{"cowboy": {:hex, :cowboy, "1.0.2"},
   "cowlib": {:hex, :cowlib, "1.0.1"},
   "earmark": {:hex, :earmark, "0.1.15"},
   "ex_doc": {:hex, :ex_doc, "0.7.2"},
   "hackney": {:hex, :hackney, "1.0.6"},
   "httpoison": {:hex, :httpoison, "0.6.2"},
   "idna": {:hex, :idna, "1.0.2"},
-  "plug": {:hex, :plug, "0.12.0"},
+  "plug": {:hex, :plug, "1.0.0"},
   "poison": {:hex, :poison, "1.3.1"},
-  "ranch": {:hex, :ranch, "1.0.0"},
+  "ranch": {:hex, :ranch, "1.1.0"},
   "ssl_verify_hostname": {:hex, :ssl_verify_hostname, "1.0.1"}}
diff --git a/test/oauth2/strategy/auth_code_test.exs b/test/oauth2/strategy/auth_code_test.exs
index c9f7153..09ae26b 100644
--- a/test/oauth2/strategy/auth_code_test.exs
+++ b/test/oauth2/strategy/auth_code_test.exs
@@ -21,11 +21,11 @@ defmodule OAuth2.Strategy.AuthCodeTest do
     Plug.Adapters.Cowboy.http Client, [], port: 4998
 
     conn = call(Client, conn(:get, "/auth"))
-    [location] = get_resp_header conn, "Location"
+    [location] = get_resp_header conn, "location"
     conn = call(Provider, conn(:get, location))
     assert conn.status == 302
 
-    [location] = get_resp_header conn, "Location"
+    [location] = get_resp_header conn, "location"
     conn = call(Client, conn(:get, location))
     assert conn.params["code"] == "1234"
 
diff --git a/test/test_helper.exs b/test/test_helper.exs
index 7e59c83..e946c98 100644
--- a/test/test_helper.exs
+++ b/test/test_helper.exs
@@ -12,7 +12,7 @@ defmodule Provider do
   get "/oauth/authorize" do
     redirect_uri = conn.params["redirect_uri"]
     conn
-    |> put_resp_header("Location", redirect_uri <> "?" <> "code=1234")
+    |> put_resp_header("location", redirect_uri <> "?" <> "code=1234")
     |> send_resp(302, "")
   end
 
@@ -47,7 +47,7 @@ defmodule Client do
 
   get "/auth" do
     conn
-    |> put_resp_header("Location", OAuth2.Client.authorize_url!(client(conn)))
+    |> put_resp_header("location", OAuth2.Client.authorize_url!(client(conn)))
     |> send_resp(302, "")
   end