diff --git a/requirements.txt b/requirements.txt
index 3ea9423..63e1eaa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ Click==7.0
 docutils==0.14
 durationpy==0.5
 Flask==1.0.2
-Flask-Cors==3.0.6
+Flask-Cors==3.0.9
 future==0.16.0
 hjson==3.0.1
 idna==2.7