diff --git a/docs/requirements.txt b/docs/requirements.txt
index 39fb15a..fbe030e 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -10,7 +10,7 @@ dataclasses==0.6; python_version < "3.7"
 fastapi==0.65.2
 future==0.18.3
 hiro==0.5.1
-idna==2.9
+idna==3.7
 importlib-metadata==1.5.0; python_version < "3.8"
 isort==4.3.21
 jinja2==2.11.3