diff --git a/docs/requirements.txt b/docs/requirements.txt
index c44d424..412ef04 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -2,4 +2,4 @@
 .[develop]
 autodoc==0.5.0
 sphinxcontrib-plantuml==0.24
-furo
+furo==2023.5.20