diff --git a/doc/requirements.txt b/doc/requirements.txt
index d0e2a2e..990ded3 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,6 +1,6 @@
 sphinxcontrib-bibtex
 renku-sphinx-theme
+sphinx>=5
 sphinx-gallery
 numpydoc
 matplotlib
-