diff --git a/setup.cfg b/setup.cfg
index 515f458..dc9455a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -39,7 +39,7 @@ setup_requires =
 docs =
 	sphinx == 5.3.0
 	sphinx-external-toc == 0.3.0
-	furo = 2022.9.29
+	furo == 2022.9.29
 
 [bdist_wheel]
 universal = false