diff --git a/web-app-flask/requirements.txt b/web-app-flask/requirements.txt
index cfe1523..93ac4f7 100644
--- a/web-app-flask/requirements.txt
+++ b/web-app-flask/requirements.txt
@@ -13,7 +13,7 @@ google-auth-httplib2==0.0.3
 google-auth-oauthlib==0.4.1
 googleapis-common-protos==1.51.0
 gunicorn==20.0.4
-httplib2==0.18.1
+httplib2==0.19.0
 idna==2.9
 itsdangerous==1.1.0
 Jinja2==2.11.2