diff --git a/crawlab/app.py b/crawlab/app.py
index 3a60c19e..eabb2bc3 100644
--- a/crawlab/app.py
+++ b/crawlab/app.py
@@ -1,10 +1,7 @@
 import os
-import subprocess
 import sys
 from multiprocessing import Process
 
-import click
-from celery import Celery
 from flask import Flask
 from flask_cors import CORS
 from flask_restful import Api
diff --git a/docs/img/payment.jpg b/docs/img/payment.jpg
new file mode 100644
index 00000000..2b20f2d8
Binary files /dev/null and b/docs/img/payment.jpg differ