diff --git a/requirement.txt b/requirement.txt
index 42e25c1..afb9f56 100644
--- a/requirement.txt
+++ b/requirement.txt
@@ -120,7 +120,7 @@ googleapis-common-protos==1.5.3
 grpcio==1.12.0
 h5py==2.8.0
 html5lib==0.9999999
-httplib2==0.11.3
+httplib2==0.18.0
 httpstatus35==0.0.1
 idna==2.7
 inflection==0.3.1