diff --git a/docs/requirements.txt b/docs/requirements.txt
index 4de04e4..5d8394e 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,6 +1,9 @@
+sphinx<7.0
+docutils==0.16
+mistune==0.8.4
+m2r2
 -e .
 numpydoc
-m2r2
 sphinxcontrib.mermaid
 sphinx_rtd_theme
 sphinxcontrib-apidoc
\ No newline at end of file