diff --git a/backend/requirements.txt b/backend/requirements.txt
old mode 100755
new mode 100644
index 883ab45..87cf8f5
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -8,7 +8,7 @@ certifi==2019.6.16
 chardet==3.0.4
 Click==7.0
 Flask==1.0.2
-Flask-Cors==3.0.6
+Flask-Cors==3.0.9
 Flask-Migrate==2.1.1
 Flask-Script==2.0.6
 Flask-SQLAlchemy==2.4.0