diff --git a/docs/requirements.txt b/docs/requirements.txt
index 2c13868..2b5609f 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -5,7 +5,7 @@ beautifulsoup4==4.12.2
 certifi==2023.11.17
 charset-normalizer==3.3.2
 docutils==0.19
-idna==3.6
+idna==3.9
 imagesize==1.4.1
 importlib-metadata==6.7.0
 Jinja2==3.1.3