diff --git a/python-flask-server/requirements.txt b/python-flask-server/requirements.txt
index 36ffa6cb11691d3e1a456835317a125b426bc774..3aea70d8651a6b2ab7d4ad21b1ef956d5b6610a2 100644
--- a/python-flask-server/requirements.txt
+++ b/python-flask-server/requirements.txt
@@ -2,3 +2,4 @@ connexion == 1.0.129
 python_dateutil == 2.6.0
 setuptools >= 21.0.0
 pandas >= 0.19.2
+tables >= 3.3.0