diff --git a/python/pyproject.toml b/python/pyproject.toml
index cca5127902..0311e3783b 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -29,7 +29,7 @@ dependencies = [
 [dependency-groups]
 dev = [
     "uv==0.11.32",
-    "flit==3.12.0",
+    "flit==4.0.2",
     "ruff==0.16.0",
     "pytest==9.1.1",
     "pytest-asyncio==1.4.0",