diff --git a/.github/workflows/github-ci.yml b/.github/workflows/github-ci.yml
index 6a6a2c8..c8066b3 100644
--- a/.github/workflows/github-ci.yml
+++ b/.github/workflows/github-ci.yml
@@ -47,6 +47,15 @@ jobs:
           flags: pytests
           fail_ci_if_error: true
           token: ${{ secrets.CODECOV_TOKEN }}
+      - name: Build package test
+        run: |
+          pip install build
+          python -m build
+      - name: Build package test (with tmp folder)
+        run: |
+          mkdir tmp
+          pip install build
+          python -m build
 
   publish:
     name: Publish to PyPi
diff --git a/pyproject.toml b/pyproject.toml
index bcb6519..60e63ee 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,15 +4,13 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "uc-micro-py"
-authors = [
-    {name = "tsutsu3"},
-]
+authors = [{ name = "tsutsu3" }]
 description = "Micro subset of unicode data files for linkify-it-py projects."
 readme = "README.md"
 requires-python = ">=3.7"
 keywords = ["unicode"]
-license = {text = "MIT"}
-urls={Homepage = "https://github.com/tsutsu3/uc.micro-py"}
+license = { text = "MIT" }
+urls = { Homepage = "https://github.com/tsutsu3/uc.micro-py" }
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Programming Language :: Python :: 3",
@@ -31,5 +29,8 @@ dynamic = ["version"]
 [project.optional-dependencies]
 test = ["pytest", "coverage", "pytest-cov"]
 
+[tool.setuptools]
+packages = ["uc_micro"]
+
 [tool.setuptools.dynamic]
-version = {attr = "uc_micro.__version__"}
+version = { attr = "uc_micro.__version__" }