diff --git a/mix.exs b/mix.exs
index 05eb7852..2f4c4336 100644
--- a/mix.exs
+++ b/mix.exs
@@ -40,7 +40,7 @@ defmodule Exq.Mixfile do
     [
       {:elixir_uuid, ">= 1.2.0"},
       {:redix, ">= 0.8.1"},
-      {:poison, ">= 1.2.0 or ~> 2.0", optiona: true},
+      {:poison, ">= 1.2.0 or ~> 2.0", optional: true},
       {:jason, "~> 1.0", optional: true},
       {:excoveralls, "~> 0.6", only: :test},
       {:flaky_connection, git: "https://github.com/hamiltop/flaky_connection.git", only: :test},