diff --git a/requirements.txt b/requirements.txt
index e663b73a8..85157d95c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ html5lib==1.1
     # via xhtml2pdf
 httplib2==0.22.0
     # via plantuml
-idna==3.4
+idna==3.7
     # via requests
 imagesize==1.4.1
     # via sphinx