diff --git a/README.md b/README.md
index 9d73469..3b6b216 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,7 @@ of the following in your `config/config.exs` file:
 config :ex_ngrok,
   # The name of the Ngrok executable
   executable: "ngrok",
-  # The type of tunnel (http, tcp, or tls)
+  # The type of tunnel (http, https, tcp, or tls)
   protocol: "http",
   # The port to which Ngrok will forward requests
   port: "4000",
diff --git a/lib/executable.ex b/lib/executable.ex
index fb6fb66..ac6846b 100644
--- a/lib/executable.ex
+++ b/lib/executable.ex
@@ -20,10 +20,20 @@ defmodule Ngrok.Executable do
   defp ngrok do
     arguments = [
       Application.get_env(:ex_ngrok, :executable),
-      Application.get_env(:ex_ngrok, :protocol),
+      protocol(),
       Application.get_env(:ex_ngrok, :port),
       Application.get_env(:ex_ngrok, :options),
     ]
     Enum.join(arguments, " ")
   end
+
+  @spec protocol :: String.t
+  defp protocol do
+    case Application.get_env(:ex_ngrok, :protocol) do
+      "https" ->
+        "http"
+      protocol ->
+        protocol
+    end
+  end
 end
diff --git a/mix.exs b/mix.exs
index 3630667..1e46939 100644
--- a/mix.exs
+++ b/mix.exs
@@ -3,7 +3,7 @@ defmodule Ngrok.Mixfile do
 
   def project do
     [app: :ex_ngrok,
-     version: "0.3.3",
+     version: "0.3.4",
      elixir: "~> 1.7",
      build_embedded: Mix.env == :prod,
      start_permanent: Mix.env == :prod,