diff --git a/pyproject.toml b/pyproject.toml
index 6d71956..64a5db5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,6 +41,7 @@ sensospot_parse = "sensospot_parser:main"
 [project.optional-dependencies]
 dev = [
     "black",
+    "flit",
     "keyring",
     "pre-commit",
     "ruff",