diff --git a/requirements.txt b/requirements.txt
index ec04579d3..8fc9e370f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,13 +2,13 @@ werkzeug==0.16.1
 setuptools==33.1.1
 wheel
 flask==1.0.2
-flask-session
+flask-session==1.0.2
 flask-socketio
 flask-helper==0.19
 cache==1.0.3
 flask-caching==1.8.0
 gunicorn==19.9
-gevent
+gevent==1.3.7
 gevent-websocket
 psutil
 pillow