diff --git a/samples/stamp/atos/functional/template/browser/requirements.txt b/samples/stamp/atos/functional/template/browser/requirements.txt
old mode 100755
new mode 100644
index f54fcf4b..7fab41db
--- a/samples/stamp/atos/functional/template/browser/requirements.txt
+++ b/samples/stamp/atos/functional/template/browser/requirements.txt
@@ -7,7 +7,7 @@ Django==1.10.2
 django-allauth==0.27.0
 django-rest-auth==0.8.1
 djangorestframework==3.4.7
-httplib2==0.9.2
+httplib2==0.18.0
 oauth2==1.9.0.post1
 oauthlib==2.0.0
 psycopg2-binary