diff --git a/requirements.txt b/requirements.txt
index 2663a587..f6522c2a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ google-i18n-address==2.5.2
     # via xml2rfc
 html5lib==1.1
     # via xml2rfc
-idna==3.3
+idna==3.7
     # via requests
 intervaltree==3.1.0
     # via xml2rfc