diff --git a/flask-server/requirements.txt b/flask-server/requirements.txt
index 2e93968f..5a7c5824 100644
--- a/flask-server/requirements.txt
+++ b/flask-server/requirements.txt
@@ -22,7 +22,7 @@ googleapis-common-protos==1.52.0
 grpcio==1.30.0
 gunicorn==20.0.4
 httplib2==0.18.1
-idna==2.10
+idna==3.7
 itsdangerous==1.1.0
 Jinja2==2.11.2
 MarkupSafe==1.1.1