diff --git a/requirements_doc.txt b/requirements_doc.txt
index e52dc0f69..37f26095c 100644
--- a/requirements_doc.txt
+++ b/requirements_doc.txt
@@ -5,7 +5,7 @@ docutils==0.21.2
 lxml==5.3.0
 myst-nb==1.1.2
 nbclient==0.10.1
-Sphinx==7.4.7
+Sphinx==8.1.3
 sphinx-autoapi==3.4.0
 sphinx-autobuild==2024.10.3
 sphinx-book-theme==1.1.3