diff --git a/README.md b/README.md
index 610ec7d..84bfaae 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ The package can be installed by adding `ex_aws_dynamo` to your list of dependenc
 ```elixir
 def deps do
   [
-    {:ex_aws_dynamo, "~> 3.0"},
+    {:ex_aws_dynamo, "~> 4.0"},
     {:jason, "~> 1.0"},
     {:hackney, "~> 1.9"}
   ]
diff --git a/mix.exs b/mix.exs
index 1dbffc5..edeadcf 100644
--- a/mix.exs
+++ b/mix.exs
@@ -1,7 +1,7 @@
 defmodule ExAws.Dynamo.Mixfile do
   use Mix.Project
 
-  @version "3.0.3"
+  @version "4.0.0"
   @service "dynamo"
   @url "https://github.com/ex-aws/ex_aws_#{@service}"
   @name __MODULE__ |> Module.split() |> Enum.take(2) |> Enum.join(".")