diff --git a/docs/requirements.txt b/docs/requirements.txt
index f3432ec16..b3c120b8d 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,5 @@
-sphinx
+# sphinx-inline-tabs breaks with sphinx >= 9
+sphinx <= 8.2.3
 furo
 sphinx-copybutton
 sphinxext-opengraph