diff --git a/backend/requirements.txt b/backend/requirements.txt
old mode 100755
new mode 100644
index f810e70..d319d4d
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -6,7 +6,7 @@ chardet==3.0.4
 Click==7.0
 coverage==5.0.4
 Flask==1.0.3
-Flask-Cors==3.0.7
+Flask-Cors==3.0.9
 Flask-Migrate==2.5.2
 Flask-RESTful==0.3.7
 Flask-SQLAlchemy==2.4.0