diff --git a/setup.cfg b/setup.cfg
index 09afb3e..fce89d4 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -34,7 +34,7 @@ install_requires =
     filelock==3.0.12
     Flask==1.1.2
     flask-cors==3.0.9
-    idna==2.9
+    idna==3.7
     itsdangerous==2.0.1
     jinja2==3.0.1
     jsonschema==3.0.0