diff --git a/CHANGELOG.md b/CHANGELOG.md
index cb6012f..6fa82a2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## Change Log
 
+## v0.5.1 (2017/05/22)
+- Poison dependency further relaxed to ~> 2.0 or ~> 3.0 to allow for Phoenix
+- Removed unnecessary ibrowse mention from README
+
 ## v0.5.0 (2017/04/13)
 - This release brought to you by the tireless @asgoel
 - Core suppression list support
diff --git a/README.md b/README.md
index 95fea18..17b7e0e 100644
--- a/README.md
+++ b/README.md
@@ -19,8 +19,7 @@ Capabilities include:
   ```elixir
   def deps do
     [
-      {:ibrowse, github: "cmullaparthi/ibrowse", tag: "v4.1.2"},
-      {:sparkpost, "~> 0.5.0"}
+      {:sparkpost, "~> 0.5.1"}
     ]
   end
   ```
diff --git a/mix.exs b/mix.exs
index cf076a1..0ff7cb0 100644
--- a/mix.exs
+++ b/mix.exs
@@ -3,7 +3,7 @@ defmodule SparkPost.Mixfile do
 
   def project do
     [app: :sparkpost,
-     version: "0.5.0",
+     version: "0.5.1",
      elixir: "~> 1.2",
      build_embedded: Mix.env == :prod,
      start_permanent: Mix.env == :prod,
@@ -26,7 +26,7 @@ defmodule SparkPost.Mixfile do
   defp deps do
     [
       {:httpoison, "~> 0.9"},
-      {:poison, "~> 3.0"},
+      {:poison, "~> 2.0 or ~> 3.0"},
       {:mock, "~> 0.2.0", only: :test},
       {:excoveralls, "~> 0.5.7", only: :test},
       {:credo, "~> 0.5.1", only: [:dev, :test]},