diff --git a/requirements.txt b/requirements.txt
index 1ff9e65..1e208df 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ django-reversion==3.0.0
 django-simple-captcha==0.5.9
 et-xmlfile==1.0.1
 future==0.16.0
-httplib2==0.9.2
+httplib2==0.18.0
 jdcal==1.4
 mysqlclient==1.3.10
 odfpy==1.3.6