diff --git a/requirements.txt b/requirements.txt
index d66edb8..b971a5b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ django-reversion==2.0.13
 django-simple-captcha==0.5.6
 et-xmlfile==1.0.1
 future==0.15.2
-httplib2==0.9.2
+httplib2==0.18.0
 jdcal==1.3
 mysqlclient==1.3.12
 odfpy==1.3.6