diff --git a/pyproject-fmt/pyproject.toml b/pyproject-fmt/pyproject.toml
index 377e670..8f0944b 100644
--- a/pyproject-fmt/pyproject.toml
+++ b/pyproject-fmt/pyproject.toml
@@ -32,6 +32,7 @@ dynamic = [
   "version",
 ]
 dependencies = [
+  "tomli>=2.0.2; python_version<'3.11'",
 ]
 urls."Bug Tracker" = "https://github.com/tox-dev/toml-fmt/issues"
 urls."Changelog" = "https://github.com/tox-dev/toml-fmt/blob/main/pyproject-fmt/CHANGELOG.md"