diff --git a/pyproject.toml b/pyproject.toml
index 226b4d2..5ff10a8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,7 @@ dev = [
     "black==24.4.2",
     "coverage==7.5.1",
     "flake8==7.0.0",
-    "flit==3.9.0",
+    "flit==3.12.0",
     "mypy==1.10.0",
     "sphinx==7.1.2; python_version < '3.9'",
     "sphinx==7.3.7; python_version >= '3.9'",