diff --git a/requirements.txt b/requirements.txt
index 1ac04ec..d4a363f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 web3==4.3.0
 eth-account
 flask>=0.12.3
-flask-cors==3.0.3
+flask-cors==5.0.0
 flask-restplus==0.10.1
 python-dateutil==2.7.3
 pyOpenSSL==18.0.0