diff --git a/pyproject.toml b/pyproject.toml
index c0a4638..3562db3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -67,7 +67,7 @@ docs = [
     "mkdocs-include-markdown-plugin",
     "mkdocs-literate-nav>=0.6.0",
     "mkdocs-material>=9.1.0",
-    "mkdocs-section-index>=0.3.5",
+    "mkdocs-section-index>=0.3.11",
     "mkdocs>=1.4.3",
     "mkdocstrings[python]",
     "python-frontmatter",