diff --git a/doc/_readthedocs-requirements.txt b/doc/_readthedocs-requirements.txt
index d9e029f..bb5f540 100644
--- a/doc/_readthedocs-requirements.txt
+++ b/doc/_readthedocs-requirements.txt
@@ -1,2 +1,2 @@
-sphinx==7.1.1
+sphinx<7.0.0
 tomli
\ No newline at end of file