diff --git a/package.json b/package.json
index 7b05616..6934074 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "minyami",
-  "version": "2.1.1",
+  "version": "2.1.2",
   "description": "",
   "main": "index.js",
   "scripts": {
diff --git a/src/core/archive.ts b/src/core/archive.ts
index 5ea3fcb..fe126a3 100644
--- a/src/core/archive.ts
+++ b/src/core/archive.ts
@@ -2,7 +2,7 @@ import Logger from '../utils/log';
 import { mergeToMKV, mergeToTS } from '../utils/media';
 import { deleteDirectory } from '../utils/system';
 import M3U8 from './m3u8';
-import Downloader, { ArchiveDownloaderConfig, ChunkItem, isChunkGroup, Chunk, ChunkGroup } from './downloader';
+import Downloader, { ArchiveDownloaderConfig, ChunkItem, isChunkGroup, Chunk } from './downloader';
 import * as fs from 'fs';
 import { saveTask, deleteTask, getTask } from '../utils/task';
 import { timeStringToSeconds } from '../utils/time';
@@ -17,7 +17,9 @@ class ArchiveDownloader extends Downloader {
     chunks: ChunkItem[] = [];
     allChunks: ChunkItem[] = [];
     pickedChunks: ChunkItem[] = [];
-    finishedFilenames: { [index: string]: any } = {};
+    // 使用 Object 的原因是使用数组，检索需要遍历数组 1/2 * n^2 次 
+    // 当有数千块的时候有那么一点点不可接受
+    finishedFilenames: { [index: string]: any } = {}; 
     outputFileList: string[];
 
     totalChunksCount: number;
diff --git a/src/core/downloader.ts b/src/core/downloader.ts
index 9caf5b2..7a57e2d 100644
--- a/src/core/downloader.ts
+++ b/src/core/downloader.ts
@@ -106,7 +106,7 @@ class Downloader {
         }
 
         if (output) {
-            this.outputPath = output;
+            this.outputPath = output.replace(/[\/\*\\\:|\?<>]/ig, "");
         }
 
         if (key) {
diff --git a/src/index.ts b/src/index.ts
index d01c938..73e8140 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -132,8 +132,13 @@ Erii.addOption({
         validate: (path: string, logger) => {
             if (!path.endsWith('.mkv') && !path.endsWith('.ts')) {
                 logger('Output filename must ends with .mkv or .ts.');
+                return false;
+            }
+            if (path.match(/[\/\*\\\:|\?<>]/)) {
+                logger('Filename should\'t contain \\, /, :, |, <, >.');
+                return false;
             }
-            return !(!path.endsWith('.mkv') && !path.endsWith('.ts'));
+            return true;
         }
     },
 });