diff --git a/requirements.txt b/requirements.txt
index 87f5568..4b91979 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ cachetools==3.1.0
 google-api-python-client==1.7.8
 google-auth-httplib2==0.0.3
 google-auth==1.6.3
-httplib2==0.12.1
+httplib2==0.19.0
 pyasn1-modules==0.2.4
 pyasn1==0.4.5
 rsa==4.0