diff --git a/requirements.txt b/requirements.txt
index bd1c0cd..aa2b194 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ eth-rlp==0.1.2
 eth-typing==2.1.0
 eth-utils==1.6.1
 Flask==1.0.3
-Flask-Cors==3.0.8
+Flask-Cors==3.0.9
 flask-restplus==0.12.1
 hexbytes==0.2.0
 idna==2.8