diff --git a/pyproject.toml b/pyproject.toml
index 54931e2ff2..8b6fd48edd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -99,6 +99,9 @@ doc = [
 
 	# workaround for pypa/setuptools#4333
 	"pyproject-hooks!=1.1",
+
+	# workaround for sphinx-doc/sphinx#12613
+	"sphinx < 7.4",
 ]
 ssl = []
 certs = []