diff --git a/.github/workflows/check-dist.yml b/.github/workflows/check-dist.yml
index 020a7be..3b8673c 100644
--- a/.github/workflows/check-dist.yml
+++ b/.github/workflows/check-dist.yml
@@ -52,7 +52,7 @@ jobs:
         id: diff
 
       # If index.js was different than expected, upload the expected version as an artifact
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         if: ${{ failure() && steps.diff.conclusion == 'failure' }}
         with:
           name: dist
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 57e6ee7..691194e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -46,3 +46,9 @@ jobs:
         with:
           ruid: '477317922'
           roomid: '21672023'
+          output: './data/yyyy-MM-dd.csv'
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: data
+          path: data/
diff --git a/README.md b/README.md
index a09392d..0ab3110 100644
--- a/README.md
+++ b/README.md
@@ -10,16 +10,22 @@ Automatically fetch the captain list of your favourite bilibili VUP.
 Add the following config to your Github Actions. Fill roomid and ruid.
 
 ```yml
-- uses: yjl9903/fetch-captain@v0
+- uses: yjl9903/fetch-captain@v1
   with:
     ruid: <UID>
     roomid: <直播间 ID>
-    # outDir: './'
+    # output: './yyyy-MM-dd.csv'
 ```
 
 Notice that you should push changes (e.g. `./2022-3-5.csv`) in your following actions steps manually.
 
-Example repo: [Miki-Captain](https://github.com/yjl9903/Miki-Captain).
+Example repo: [Miki-Captain](https://github.com/yjl9903/Miki-Captain), [Nagisa-Captain](https://github.com/yjl9903/Nagisa-Captain).
+
+> 👷 **Migration from v0 to v1**
+>
+> **Sending email is deprecated**: If you still want to use it, please combine this action with other stuffs.
+>
+> **CSV output path**: Change `outdir` to `output`, which means the output file pattern instead of output directory. It uses [date-fns/format](https://date-fns.org/v3.6.0/docs/format) to format date string under the hood. By default, it will dump csv file to `./yyyy-MM-dd.csv` (i.e. `./2024-04-25.csv`).
 
 ## License
 
diff --git a/action.yml b/action.yml
index 7ae16eb..ed98328 100644
--- a/action.yml
+++ b/action.yml
@@ -7,14 +7,14 @@ author: 'yjl9903'
 inputs:
   ruid:
     required: true
-    description: 'up 主 uid'
+    description: 'Up 主 uid'
   roomid:
     required: true
     description: '直播房间 id'
-  outDir:
+  output:
     required: false
-    description: '输出目录'
-    default: './'
+    description: '输出 CSV 文件路径'
+    default: './yyyy-MM-dd.csv'
 
 runs:
   using: 'node20'
diff --git a/dist/index.js b/dist/index.js
index d20e646..80c1f9a 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -182,22 +182,25 @@ function today() {
 }
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
+        const now = new Date();
         const ruid = core.getInput('ruid');
         const roomid = core.getInput('roomid');
-        const outDir = core.getInput('outDir');
+        const outputPattern = core.getInput('output');
         const client = new client_1.Client(roomid, ruid);
         const list = yield client.get();
         // Print users
         (0, output_1.printUsers)(list);
         // Dump fetched list to csv
         {
-            const csvname = path_1.default.join(outDir, `${today()}.csv`);
+            const csvname = (0, date_fns_1.format)(now, outputPattern);
             const content = (0, output_1.toCSV)(list);
             core.info(`---------------------------------------`);
             core.info(`Writing to ${csvname}`);
+            // Set output `csv` for further usage
             core.setOutput('csv', csvname);
-            if (!(0, fs_1.existsSync)(outDir)) {
-                (0, fs_1.mkdirSync)(outDir, { recursive: true });
+            // Dump csv
+            if (!(0, fs_1.existsSync)(path_1.default.dirname(csvname))) {
+                (0, fs_1.mkdirSync)(path_1.default.dirname(csvname), { recursive: true });
             }
             (0, fs_1.writeFileSync)(csvname, content, 'utf-8');
         }
diff --git a/src/main.ts b/src/main.ts
index 4fd1157..b0f1930 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -13,9 +13,11 @@ function today(): string {
 }
 
 async function run(): Promise<void> {
+  const now = new Date();
+
   const ruid = core.getInput('ruid');
   const roomid = core.getInput('roomid');
-  const outDir = core.getInput('outDir');
+  const outputPattern = core.getInput('output');
 
   const client = new Client(roomid, ruid);
   const list = await client.get();
@@ -25,13 +27,18 @@ async function run(): Promise<void> {
 
   // Dump fetched list to csv
   {
-    const csvname = path.join(outDir, `${today()}.csv`);
+    const csvname = format(now, outputPattern);
+
     const content = toCSV(list);
     core.info(`---------------------------------------`);
     core.info(`Writing to ${csvname}`);
+
+    // Set output `csv` for further usage
     core.setOutput('csv', csvname);
-    if (!existsSync(outDir)) {
-      mkdirSync(outDir, { recursive: true });
+
+    // Dump csv
+    if (!existsSync(path.dirname(csvname))) {
+      mkdirSync(path.dirname(csvname), { recursive: true });
     }
     writeFileSync(csvname, content, 'utf-8');
   }