diff --git a/mix.exs b/mix.exs
index 8c278f7..e6ddf7e 100644
--- a/mix.exs
+++ b/mix.exs
@@ -58,7 +58,7 @@ defmodule ReverseProxyPlug.MixProject do
       {:excoveralls, "~> 0.18", only: :test},
       {:mix_test_watch, "~> 1.1", only: [:dev, :test], runtime: false},
       {:plug, "~> 1.6"},
-      {:httpoison, "~> 1.4 or ~> 2.0", optional: true},
+      {:httpoison, "~> 1.4 or ~> 2.0 or ~> 3.0", optional: true},
       {:credo, "~> 1.0", only: [:dev, :test], runtime: false},
       {:hammox, "~> 0.7", only: :test},
       {:ex_doc, ">= 0.0.0", only: :dev, runtime: false},