diff --git a/crawlab/requirements.txt b/crawlab/requirements.txt
index d5ac763c..39912ed9 100644
--- a/crawlab/requirements.txt
+++ b/crawlab/requirements.txt
@@ -10,3 +10,4 @@ Flask==1.0.2
 lxml==4.3.3
 Flask_Cors==3.0.7
 Werkzeug==0.15.2
+eventlet