diff --git a/requirements.txt b/requirements.txt
index 41fd439..ce8bb82 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ chardet==3.0.4
 click==7.1.2
 Flask==1.1.2
 gunicorn==20.0.4
-idna==2.9
+idna==3.7
 itsdangerous==1.1.0
 Jinja2==2.11.3
 lxml==4.9.1