diff --git a/requirements.txt b/requirements.txt
index c69cce9..d0e6a50 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,7 @@ google-auth==1.10.0
 google-auth-httplib2==0.0.3
 google-cloud==0.34.0
 gunicorn==20.0.4
-httplib2==0.18.0
+httplib2==0.19.0
 idna==2.9
 importlib-metadata==1.3.0
 inflect==4.0.0