diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index b0114b8..960fdf2
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ google-auth==1.5.1
 google-auth-httplib2==0.0.3
 greenlet==0.4.15
 gunicorn==19.9.0
-httplib2==0.11.3
+httplib2==0.19.0
 idna==2.7
 isort==4.3.4
 itsdangerous==0.24