diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 994f8da..36a540e
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ django-import-export==0.5.1
 enum34==1.1.6
 et-xmlfile==1.0.1
 future==0.16.0
-httplib2==0.9.2
+httplib2==0.18.0
 idna==2.6
 ipaddress==1.0.18
 ipython==5.5.0