diff --git a/python-flask-api/requirements.txt b/python-flask-api/requirements.txt
index a2bd507..361d3ca 100644
--- a/python-flask-api/requirements.txt
+++ b/python-flask-api/requirements.txt
@@ -17,7 +17,7 @@ future==0.16.0
 grpcio==1.12.1
 gunicorn==19.8.1
 h5py==2.7.0
-httplib2==0.11.3
+httplib2==0.19.0
 idna==2.7
 itsdangerous==0.24
 kiwisolver==1.0.1