diff --git a/pyproject.toml b/pyproject.toml
index 29a88c8f..4fa64945 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ documentation = "https://jageo.github.io/LobsterPy/"
 changelog = "https://jageo.github.io/LobsterPy/about/changelog.html"
 
 [project.optional-dependencies]
-featurizer = ["mendeleev==0.20.0"]
+featurizer = ["mendeleev==0.20.1"]
 dev = ["pre-commit>=2.12.1"]
 tests = ["pytest", "pytest-mock", "pytest-split", "pytest-cov", "types-setuptools"]
 docs = [