diff --git a/pyproject.toml b/pyproject.toml
index da6d4b0..14a9a89 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,11 +1,12 @@
 [build-system]
-requires = ["uv_build>=0.9.6,<0.11.0"]
-build-backend = "uv_build"
+requires = ["flit_core >=3.11,<5"]
+build-backend = "flit_core.buildapi"
 
-[tool.uv.build-backend]
-source-include = ["tests/**"]
-module-name = "cachecontrol"
-module-root = ""
+[tool.flit.module]
+name = "cachecontrol"
+
+[tool.flit.sdist]
+include = ["tests/"]
 
 
 [project]