diff --git a/pyproject.toml b/pyproject.toml
index 92ae971..1a4351e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ dependencies = []
 
 dev = ["pre-commit == 3.7.1", "ruff == 0.6.3", "mypy == 1.10.1"]
 
-doc = ["mkdocs == 1.6.0", "mkdocs-material == 9.5.30", "mkdocstrings == 0.25.2"]
+doc = ["mkdocs == 1.6.0", "mkdocs-material == 9.5.40", "mkdocstrings == 0.25.2"]
 
 test = [
     "pytest == 8.2.2",
diff --git a/requirements/doc-requirements.txt b/requirements/doc-requirements.txt
index dea684a..b4fe136 100644
--- a/requirements/doc-requirements.txt
+++ b/requirements/doc-requirements.txt
@@ -42,7 +42,7 @@ mkdocs==1.6.0
     #   mkdocstrings
 mkdocs-autorefs==1.0.1
     # via mkdocstrings
-mkdocs-material==9.5.30
+mkdocs-material==9.5.40
     # via isocodes (pyproject.toml)
 mkdocs-material-extensions==1.3.1
     # via mkdocs-material