diff --git a/mix.exs b/mix.exs
index 90b2c12..1c3bf7a 100644
--- a/mix.exs
+++ b/mix.exs
@@ -7,7 +7,7 @@ defmodule PrometheusEx.Mixfile do
     [
       app: :prometheus_ex,
       version: @version,
-      elixir: "~> 1.6",
+      elixir: "~> 1.7",
       build_embedded: Mix.env() == :prod,
       start_permanent: Mix.env() == :prod,
       description: description(),