diff --git a/doc/py-requirements.txt b/doc/py-requirements.txt
index 4d98053..70b708e 100644
--- a/doc/py-requirements.txt
+++ b/doc/py-requirements.txt
@@ -6,7 +6,7 @@ cffi==1.10.0
 chardet==3.0.4
 cryptography==2.0.3
 enum34==1.1.6
-httplib2==0.10.3
+httplib2==0.19.0
 idna==2.6
 ipaddress==1.0.18
 Jinja2==2.9.6