diff --git a/smart-docs/requirements.txt b/smart-docs/requirements.txt
index 3ecd6dd0..f6f3e505 100644
--- a/smart-docs/requirements.txt
+++ b/smart-docs/requirements.txt
@@ -5,7 +5,7 @@ certifi==2018.4.16
 chardet==3.0.4
 CommonMark==0.5.4
 docutils==0.14
-idna==2.7
+idna==3.7
 imagesize==1.0.0
 Jinja2==2.10
 livereload==2.5.2