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/crawlab/requirements.txt b/crawlab/requirements.txt
index 8b13446c..ed1c6ad9 100644
--- a/crawlab/requirements.txt
+++ b/crawlab/requirements.txt
@@ -6,6 +6,7 @@ asn1crypto==0.24.0
 async-timeout==3.0.1
 attrs==19.1.0
 Automat==0.7.0
+bson==0.5.8
 Babel==2.6.0
 beautifulsoup4==4.7.1
 billiard==3.6.0.0