diff --git a/requirements.py b/requirements.py
index 637e1887a5..7f976d671c 100644
--- a/requirements.py
+++ b/requirements.py
@@ -46,6 +46,7 @@
 
 install_requires = [
     'gevent==20.6.1',
+    'greenlet==0.4.16',
     'grequests',
     'requests==2.23.0',
     'ply',