diff --git a/requirements.txt b/requirements.txt
index ffc537d..d7f5e92 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ django-reversion==3.0.4
 django-simple-captcha==0.5.11
 et-xmlfile==1.0.1
 future==0.17.1
-httplib2==0.13.0
+httplib2==0.18.0
 jdcal==1.4.1
 mysqlclient==1.4.2.post1
 odfpy==1.4.0