diff --git a/mix.exs b/mix.exs
index 288f201..2b79696 100644
--- a/mix.exs
+++ b/mix.exs
@@ -4,7 +4,7 @@ defmodule Liberator.MixProject do
   def project do
     [
       app: :liberator,
-      description: "An Elixir library for building controllers that obey the HTTP spec."
+      description: "An Elixir library for building controllers that obey the HTTP spec.",
       version: "1.0.0",
       elixir: "~> 1.9",
       start_permanent: Mix.env() == :prod,