diff --git a/backend/requirements.txt b/backend/requirements.txt
old mode 100755
new mode 100644
index a22325c..2757304
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -1,4 +1,4 @@
 pymongo==3.6.1
 Flask==1.1.1
-Flask-Cors==3.0.8
+Flask-Cors==3.0.9
 pyopenssl==18.0.0