diff --git a/docs/requirements.txt b/docs/requirements.txt
index 23f94bd..bf22264 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -33,7 +33,7 @@ roman-numerals-py==3.1.0 ; python_full_version >= '3.11'
 scipy==1.15.3
 semver==3.0.4
 snowballstemmer==3.0.1
-soupsieve==2.8
+soupsieve==2.9
 sphinx==8.1.3 ; python_full_version < '3.11'
 sphinx==8.2.3 ; python_full_version >= '3.11'
 sphinxcontrib-applehelp==2.0.0