diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
new file mode 100644
index 0000000..bcd80d2
--- /dev/null
+++ b/.github/workflows/lint.yml
@@ -0,0 +1,24 @@
+name: Lint
+
+on:
+    pull_request:
+        branches: [master]
+
+jobs:
+    Test:
+        name: Lint
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+
+            - name: Install the latest version of rye
+              uses: eifinger/setup-rye@v3
+
+            - name: rye sync
+              run: rye sync
+
+            - name: Lint with ruff
+              run: rye run ruff --output-format=github .
+
+            - name: Format with ruff
+              run: rye run ruff format .
diff --git a/.gitignore b/.gitignore
index 16d18bc..8ecd869 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 __pycache__/
 .DS_Store
 .venv
-dist
\ No newline at end of file
+dist
+.ruff_cache
\ No newline at end of file
diff --git a/README.md b/README.md
index b58dded..c71e4e5 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ pip install tileget
 
 ## usage
 
-```
+```planetext
 usage: __main__.py [-h] [-e OUTPUT_DIR] [-o OUTPUT_FILE] [--extent EXTENT EXTENT EXTENT EXTENT] [--geojson GEOJSON] [--minzoom MINZOOM] [--maxzoom MAXZOOM] [--interval INTERVAL] [--overwrite] [--timeout TIMEOUT] [--tms]
                    tileurl
 
@@ -39,6 +39,10 @@ options:
 ### examples
 
 ```sh
-tileget https://cyberjapandata.gsi.go.jp/xyz/seamlessphoto/{z}/{x}/{y}.jpg -e ./output_dir --extent 141.23 40.56 142.45 43.78 --maxzoom 12
-tileget https://cyberjapandata.gsi.go.jp/xyz/seamlessphoto/{z}/{x}/{y}.jpg -o ./output.mbtiles
-```
\ No newline at end of file
+# basic usage
+tileget http://path/to/tile/{z}/{x}/{y}.jpg -e output_dir --extent 141.23 40.56 142.45 43.78
+tileget http://path/to/tile/{z}/{x}/{y}.jpg -o output.mbtiles --geojson input.geojson
+
+# optional arguments
+tileget http://path/to/tile/{z}/{x}/{y}.jpg -e output_dir --extent 141.23 40.56 142.45 43.78 --minzoom 0 --maxzoom 16 --interval 500 --timeout 5000 --overwrite
+```
diff --git a/pyproject.toml b/pyproject.toml
index 805a528..5790618 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "tileget"
-version = "0.4.1"
+version = "0.4.2"
 description = "Tile download utility - easily download xyz-tile data"
 readme = "README.md"
 requires-python = ">= 3.10"
diff --git a/tileget/__main__.py b/tileget/__main__.py
index 88ff0ee..6f806d5 100644
--- a/tileget/__main__.py
+++ b/tileget/__main__.py
@@ -163,6 +163,30 @@ def _download(tile):
 
         conn = sqlite3.connect(params.output_path)
 
+        # write metadata
+        c = conn.cursor()
+        c.execute(
+            "INSERT INTO metadata (name, value) VALUES (?, ?)",
+            ("name", os.path.basename(params.output_path)),
+        )
+        c.execute(
+            "INSERT INTO metadata (name, value) VALUES (?, ?)",
+            (
+                "format",
+                os.path.splitext(params.tileurl.split("?")[0])[-1].replace(".", ""),
+            ),
+        )
+        c.execute(
+            "INSERT INTO metadata (name, value) VALUES (?, ?)",
+            ("minzoom", params.minzoom),
+        )
+        c.execute(
+            "INSERT INTO metadata (name, value) VALUES (?, ?)",
+            ("maxzoom", params.maxzoom),
+        )
+
+        conn.commit()
+
         def _download(tile):
             download_mbtiles(
                 conn, tile, params.tileurl, params.timeout, params.overwrite, params.tms