diff --git a/docs/requirements.txt b/docs/requirements.txt
index 24b6ddd..4459116 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,4 @@
-Sphinx>=4
+Sphinx>=8.1.3
 sphinxcontrib-bibtex
 sphinx_autodoc_typehints
 sphinx_book_theme==1.1.4