diff --git a/doc/requirements.txt b/doc/requirements.txt
index 8751da518..fed325a3f 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,7 +1,8 @@
-sphinx>=4.2.0
+sphinx>=4.4.0
 mock
 sphinx_rtd_theme>=1.0.0
 breathe
+scikit-learn
 sh>=1.12.14
 matplotlib>=2.1
 graphviz