diff --git a/mix.exs b/mix.exs
index dcce407..4f693de 100644
--- a/mix.exs
+++ b/mix.exs
@@ -20,7 +20,7 @@ defmodule OAuth2.Mixfile do
     [
       {:hackney, "~> 0.14.1"},
       {:httpoison, "~> 0.5.0"},
-      {:poison, "~> 1.2.0"},
+      {:poison, "~> 1.2"},
       {:cowboy, "~> 1.0", only: :test},
       {:plug, "~> 0.9.0"},
     ]