diff --git a/easyci2/flask/requirements.txt b/easyci2/flask/requirements.txt
index d20577b2..b0bd8679 100644
--- a/easyci2/flask/requirements.txt
+++ b/easyci2/flask/requirements.txt
@@ -13,7 +13,7 @@ Flask==1.1.2
 Flask-Session==0.3.2
 gunicorn==20.1.0
 html5lib==1.0.1
-idna==2.8
+idna==3.7
 iniconfig==1.1.1
 ipaddr==2.2.0
 itsdangerous==1.1.0