diff --git a/config/config.exs b/config/config.exs
index 2357f59..1412799 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -1,6 +1,6 @@
 # This file is responsible for configuring your application
 # and its dependencies with the aid of the Mix.Config module.
-use Mix.Config
+import Config
 
 config :kayrock,
   connection_opts: [
diff --git a/lib/kayrock/error_code.ex b/lib/kayrock/error_code.ex
index 8f4cf34..a34ca34 100644
--- a/lib/kayrock/error_code.ex
+++ b/lib/kayrock/error_code.ex
@@ -67,7 +67,7 @@ defmodule Kayrock.ErrorCode do
   end
 
   def code_to_atom(code) do
-    Logger.warn("Unknown error code #{inspect(code)}")
+    Logger.warning("Unknown error code #{inspect(code)}")
     :unknown
   end
 
diff --git a/lib/kayrock/message_set.ex b/lib/kayrock/message_set.ex
index d5e218d..975c5ff 100644
--- a/lib/kayrock/message_set.ex
+++ b/lib/kayrock/message_set.ex
@@ -27,7 +27,7 @@ defmodule Kayrock.MessageSet do
     @type t :: %__MODULE__{}
   end
 
-  use Bitwise
+  import Bitwise
 
   defstruct messages: [], magic: 0
 
diff --git a/lib/kayrock/record_batch.ex b/lib/kayrock/record_batch.ex
index 7ebe8d3..33ed4c2 100644
--- a/lib/kayrock/record_batch.ex
+++ b/lib/kayrock/record_batch.ex
@@ -60,7 +60,7 @@ defmodule Kayrock.RecordBatch do
 
   @type t :: %__MODULE__{}
 
-  use Bitwise
+  import Bitwise
 
   alias Kayrock.Compression
   alias Kayrock.MessageSet