diff --git a/mix.exs b/mix.exs
index 043cf53..d8d47b0 100644
--- a/mix.exs
+++ b/mix.exs
@@ -44,7 +44,7 @@ defmodule CloudflareAccessEx.MixProject do
       {:credo, "~> 1.7", only: :test, runtime: false},
       {:dialyxir, "~> 1.3", only: :test, runtime: false},
       {:doctor, "~> 0.21.0", only: [:dev, :test], runtime: false},
-      {:ex_check, "~> 0.15.0", only: :test, runtime: false},
+      {:ex_check, "~> 0.16.0", only: :test, runtime: false},
       {:ex_doc, "~> 0.27", only: [:dev, :test], runtime: false},
       {:mix_audit, "~> 2.0", only: :test, runtime: false},
       {:httpoison, "~> 1.7 or ~> 2.0"},
diff --git a/mix.lock b/mix.lock
index f8dca73..4d9ddb4 100644
--- a/mix.lock
+++ b/mix.lock
@@ -7,7 +7,7 @@
   "doctor": {:hex, :doctor, "0.21.0", "20ef89355c67778e206225fe74913e96141c4d001cb04efdeba1a2a9704f1ab5", [:mix], [{:decimal, "~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}], "hexpm", "a227831daa79784eb24cdeedfa403c46a4cb7d0eab0e31232ec654314447e4e0"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.37", "2ad73550e27c8946648b06905a57e4d454e4d7229c2dafa72a0348c99d8be5f7", [:mix], [], "hexpm", "6b19783f2802f039806f375610faa22da130b8edc21209d0bff47918bb48360e"},
   "erlex": {:hex, :erlex, "0.2.6", "c7987d15e899c7a2f34f5420d2a2ea0d659682c06ac607572df55a43753aa12e", [:mix], [], "hexpm", "2ed2e25711feb44d52b17d2780eabf998452f6efda104877a3881c2f8c0c0c75"},
-  "ex_check": {:hex, :ex_check, "0.15.0", "074b94c02de11c37bba1ca82ae5cc4926e6ccee862e57a485b6ba60fca2d8dc1", [:mix], [], "hexpm", "33848031a0c7e4209c3b4369ce154019788b5219956220c35ca5474299fb6a0e"},
+  "ex_check": {:hex, :ex_check, "0.16.0", "07615bef493c5b8d12d5119de3914274277299c6483989e52b0f6b8358a26b5f", [:mix], [], "hexpm", "4d809b72a18d405514dda4809257d8e665ae7cf37a7aee3be6b74a34dec310f5"},
   "ex_doc": {:hex, :ex_doc, "0.30.9", "d691453495c47434c0f2052b08dd91cc32bc4e1a218f86884563448ee2502dd2", [:mix], [{:earmark_parser, "~> 1.4.31", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "d7aaaf21e95dc5cddabf89063327e96867d00013963eadf2c6ad135506a8bc10"},
   "file_system": {:hex, :file_system, "0.2.10", "fb082005a9cd1711c05b5248710f8826b02d7d1784e7c3451f9c1231d4fc162d", [:mix], [], "hexpm", "41195edbfb562a593726eda3b3e8b103a309b733ad25f3d642ba49696bf715dc"},
   "hackney": {:hex, :hackney, "1.18.2", "d7ff544ddae5e1cb49e9cf7fa4e356d7f41b283989a1c304bfc47a8cc1cf966f", [:rebar3], [{:certifi, "~> 2.12.0", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "~> 6.1.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "~> 1.0.0", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~> 1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:parse_trans, "3.4.1", [hex: :parse_trans, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "~> 1.1.0", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}, {:unicode_util_compat, "~> 0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "af94d5c9f97857db257090a4a10e5426ecb6f4918aa5cc666798566ae14b65fd"},