diff --git a/requirements.txt b/requirements.txt
index 78a52b0..523fa31 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ colander==1.7.0
 cornice==4.0.1
 cornice-swagger==1.0.0
 hupper==1.10.2
-idna==2.9
+idna==3.7
 iso8601==0.1.12
 lxml==4.5.0
 numpy==1.18.4