diff --git a/requirements-docs.txt b/requirements-docs.txt
index fd88409d0f..74f3df77c7 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -31,7 +31,7 @@ flask-sqlalchemy==2.3.2
 flask==0.12
 future==0.16.0
 gunicorn==19.8.1
-idna==2.6
+idna==2.7
 imagesize==1.0.0          # via sphinx
 inflection==0.3.1
 itsdangerous==0.24