diff --git a/requirements-doc.txt b/requirements-doc.txt
index a3a4879d9..481cec52b 100644
--- a/requirements-doc.txt
+++ b/requirements-doc.txt
@@ -12,5 +12,6 @@ pandoc
 Jinja2
 sphinx
 myst-nb
-sphinx_rtd_theme>=1.0.0
+sphinx_book_theme
 sphinx-autodoc-typehints
+sphinx_thebe