diff --git a/docs/requirements.txt b/docs/requirements.txt
index 4a07a8f..4deec92 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,7 +1,8 @@
 scipp
+scippneutron
 plopp
 scipy
-sphinx==6.2.1
+sphinx
 nbsphinx
 jupyter
 sphinx-autodoc-typehints