diff --git a/pyproject.toml b/pyproject.toml
index ebc082f..8d0380e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,6 +39,10 @@ dev = [
     "pytest-cov<5.0,>=4.0",
 ]
 
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
 [tool.ruff.lint]
 # import順を最適化
 extend-select = ["I"]