diff --git a/requirements.txt b/requirements.txt
index 781c584..78dbd7f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ certifi==2017.7.27.1
 chardet==3.0.4
 gcloud==0.17.0
 googleapis-common-protos==1.5.2
-httplib2==0.10.3
+httplib2==0.18.0
 idna==2.6
 jws==0.1.3
 numpy==1.13.1