diff --git a/lib/httparrot.ex b/lib/httparrot.ex
index 819384c..32ff04a 100644
--- a/lib/httparrot.ex
+++ b/lib/httparrot.ex
@@ -28,9 +28,11 @@ defmodule HTTParrot do
     {:ok, https_port} = :application.get_env(:httparrot, :https_port)
     {:ok, _} = :cowboy.start_http(:http, 100, [port: http_port],
                                   [env: [dispatch: dispatch], onresponse: &prettify_json/4])
+
+    priv_dir = :code.priv_dir(:httparrot)
     {:ok, _} = :cowboy.start_https(:https, 100,
-      [port: https_port, cacertfile: "priv/ssl/server-ca.crt",
-       certfile: "priv/ssl/server.crt", keyfile: "priv/ssl/server.key"],
+      [port: https_port, cacertfile: priv_dir ++ '/ssl/server-ca.crt',
+       certfile: priv_dir ++ '/ssl/server.crt', keyfile: priv_dir ++ '/ssl/server.key'],
       [env: [dispatch: dispatch], onresponse: &prettify_json/4])
     IO.puts "Starting HTTParrot on port #{http_port} and SSL on #{https_port}"
     HTTParrot.Supervisor.start_link