diff --git a/pyproject.toml b/pyproject.toml
index 6e50abdb..e99c7d3a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ docs = [ "sphinx<9",
     "sphinx-mdinclude==0.6.2",
     "sphinx-copybutton==0.5.2",
     "sphinx-tabs==3.4.7",
-    "sphinx-toolbox==3.8.0",
+    "sphinx-toolbox==4.1.2",
     "furo==2025.12.19"]
 dev = ["pre-commit==4.6.0"]