diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 9c903fa..ea42933
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ graphviz==0.6
 gsutil==4.28
 h5py==2.6.0
 html5lib==0.9999999
-httplib2==0.10.3
+httplib2==0.18.0
 idna==2.6
 imageio==2.1.2
 ipaddress==1.0.19