diff --git a/pyproject.toml b/pyproject.toml
index f46c985..ab26306 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ line-length = 120
 target-version = "py39"
 lint.select = ["I"]# implementation for isort
 
-[dependency-groups]
+[project.optional-dependencies]
 dev = [
     "mkdocs-material>=9.5.49",
     "mkdocs>=1.6.1",