diff --git a/docs/requirements.txt b/docs/requirements.txt
index fe3193d..61bdfb7 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -3,7 +3,7 @@ Babel==2.9.1
 certifi==2023.7.22
 chardet==3.0.4
 docutils==0.16
-idna==2.8
+idna==3.7
 imagesize==1.2.0
 Jinja2==3.1.3
 m2r==0.2.1