diff --git a/python/pyproject.toml b/python/pyproject.toml
index 7d3b783bf8..cc02032d49 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -33,7 +33,7 @@ devel = [
     "pytest-mock",
     "pytest-cov",
     "pytest-timeout",
-    "sphinx",
+    "sphinx<=4.5",
     "sphinx-rtd-theme",
     "toml",
     "typing-extensions"