diff --git a/requirements.txt b/requirements.txt
index eea42c8593..5b07f45876 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ certifi==2020.12.05
 babel==2.9.0
 flask-babel==2.0.0
 flask==1.1.2
-idna==2.10
+idna==3.1
 jinja2==2.11.3
 ## installing via package
 #lxml==4.6.3