diff --git a/requirements.txt b/requirements.txt
index 579da50..3d0a214 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ google-api-python-client==1.7.10
 google-auth==1.6.3
 google-auth-httplib2==0.0.3
 google-auth-oauthlib==0.4.0
-httplib2==0.13.0
+httplib2==0.19.0
 idna==2.8
 oauthlib==3.0.2
 pyasn1==0.4.5