diff --git a/docs/requirements.txt b/docs/requirements.txt
index 364b69c..71530fb 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,9 +1,9 @@
 GitPython
 beautifulsoup4
 ipykernel
-nbsphinx
 pandoc
-sphinx
+sphinx==6.2.1
+nbsphinx
 sphinx_autodoc_typehints
 sphinx_rtd_theme
 recommonmark