diff --git a/.gitignore b/.gitignore
index fbe0a11..b003858 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 node_modules/
 dist/
-working.env
\ No newline at end of file
+working.env
+certs/*.pem
\ No newline at end of file
diff --git a/certs/mkcert-v1.4.4-windows-amd64.exe b/certs/mkcert-v1.4.4-windows-amd64.exe
new file mode 100644
index 0000000..c9cde49
Binary files /dev/null and b/certs/mkcert-v1.4.4-windows-amd64.exe differ
diff --git a/certs/trs.cirno.biz.crt b/certs/trs.cirno.biz.crt
deleted file mode 100644
index 7fdffc2..0000000
--- a/certs/trs.cirno.biz.crt
+++ /dev/null
@@ -1,27 +0,0 @@
------BEGIN CERTIFICATE-----
-MIIEhDCCA2ygAwIBAgIUNrwBOA2VrLhOgGjmgQAEVzVj9ucwDQYJKoZIhvcNAQEL
-BQAwaTELMAkGA1UEBhMCVVMxEzARBgNVBAgMCkZha2UgU3RhdGUxFjAUBgNVBAcM
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-bN7Msi0labqOn23tU5qSOiTd/VoZLuIjavbptjx+7pbiyuUXm/ZdjVZPjBsEPH4c
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-LtmdSu4lSZBNNckR/lJMGTHsgYcgSxEUAjTvR0Tdcqh8bp4ILoDDGzJXLAiRCUEa
-0CaxJi0QpJVv81pIoqfF1TKBtNcuG/GFw8rKtUjLWwNBhLKFRxL/R9l9UbYl4ST2
-wtRXDQNe1mPq9onRtn1gNZ+fnF+NoJyK6dvdah6WI9I/mmi/p2sAYn6eYDD/UESs
-zZ5U+J8aJWNOnHzM7ibIOp9xMJje9Ox5MIXQbodPjN5iH4iShTEHphnkvpYffmXk
-ZgTnCg1JPeGbWNwRfBx7RT+BgihYaKoIc1M2j50Y6a5+A2NJF3J3DMsE+NqYU+QV
-Vi2ShD2o9ZM=
------END CERTIFICATE-----
diff --git a/certs/trs.cirno.biz.key b/certs/trs.cirno.biz.key
deleted file mode 100644
index 1b6e4a7..0000000
--- a/certs/trs.cirno.biz.key
+++ /dev/null
@@ -1,27 +0,0 @@
------BEGIN RSA PRIVATE KEY-----
-MIIEpQIBAAKCAQEAt71gJckI5q6WXCctTPaEyCvmjnZlt86uYWa/10784Ax9LCQr
-8CmO+0nznqFo7GD5k344UPdL3Ieeqy3CUTehOWCWAI5RqyVGC2+ox9hmh6WpoIpo
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-DClSKaP6AWFYdjikEfy6m01RvPR6abBdHkFnsJRpL2c3TCP5TciBeh6+zTM5tI0P
-/fZGu/kCgYEA7CpF7a4gyw8NTkd870VWunsWp9lviLZ+7oADqecg5RmSWBV4RlVr
-GRdewWxbTiiU+E6hpJ9nM+c90trHZtas4fL+0r6dqKdCeCzpSQ9Lm7stD9hxeJMp
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-4z9Afm0SjNVfVda/D5Jojn24yG4veJZW0Iyan/+3vcFq7zMXeix9O+hunde0o02Z
-4yiWb2LuhZObTRwDBi2q9IYoMzgTOw8RINs5flA7LMINQlvyKufXKf01gaCFohe3
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-doCSDTdtJdOX/u2QOozwfRk3wmizYeexfBqiPYWr3+eLQAYjOY7Lz7cWMpSf/tl3
-NhF1GtybuRAvvIh+0qfMfAOmpzENmB2xV9paGPB7casO005atr7u25iHUY7qvRaq
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-6xyV62u47kACmNARGj4tZs2Yul08dO1zEawIeowtH0DYmw97g5chHta7yoQIg+EN
-H5U34YgzQOAy98tUnYxh9fxaNdYfWc3AJEjSkYujYkg7NZ9VECYab9q4PCUePqV/
-M68EDLsCgYEAw9rYU97p52b/wwcG0E7/tzFql5V4aJP5Hko+E8eC+W8/dpXRfHlC
-yTi4Z+llPrnsZXZ2gQB1zNV31tCF/i9HGCV4H40N80eNT/d96s2WiHm7BGdxpdDZ
-ru95++Kpo4mJROgU5k7w/jeEaqsimHOzYYosem5NIgCjCy3LsffYRl0=
------END RSA PRIVATE KEY-----
diff --git a/certs/trs.cirno.bizCA.pem b/certs/trs.cirno.bizCA.pem
deleted file mode 100644
index 6649244..0000000
--- a/certs/trs.cirno.bizCA.pem
+++ /dev/null
@@ -1,20 +0,0 @@
------BEGIN CERTIFICATE-----
-MIIDWTCCAkECFCVqauiQC8vPhVhKI8qIJmhrgyiCMA0GCSqGSIb3DQEBCwUAMGkx
-CzAJBgNVBAYTAlVTMRMwEQYDVQQIDApGYWtlIFN0YXRlMRYwFAYDVQQHDA1GYWtl
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-aXJuby5iaXowHhcNMjEwODIzMDYxMjQzWhcNMjMxMTI2MDYxMjQzWjBpMQswCQYD
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-bGl0eTEVMBMGA1UECgwMRmFrZSBDb21wYW55MRYwFAYDVQQDDA10cnMuY2lybm8u
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-6B6hp/lECi9d6al8dBZqhA6eePM5OV+SayerdugPIGuFamaVrwsu5AFnP16/
------END CERTIFICATE-----
diff --git a/readme.md b/readme.md
index 56b80d7..8a4a69e 100644
--- a/readme.md
+++ b/readme.md
@@ -19,6 +19,7 @@
 ```bash
 npm install # 安装依赖
 ```
+
 请到此处 [Release](https://github.com/symant233/MTool_Cracker/releases/tag/v1.0.0) 下载老版本的 Mtool 存档 `MTool_A10U13.7z` 或 `MTool_A10_Fix5.7z`。
 
 ### 配置
@@ -29,9 +30,16 @@ npm install # 安装依赖
 127.0.0.1 trs.cirno.biz
 ```
 
-- 替换文件 `example.env` 内的 `APPID` 和 `KEY` 为你申请的应用信息, [百度翻译开放平台](https://fanyi-api.baidu.com/manage/developer)能找到. 替换后保存, 重命名此文件为 `working.env`. / 使用**腾讯翻译**则为 `TENCENTID` 和 `TENCENTKEY`（强烈建议用腾讯翻译，开通[机器翻译](https://console.cloud.tencent.com/tmt)后到[API密钥管理](https://console.cloud.tencent.com/cam/capi)查看`SecretId`和`SecretKey`）.
+- 替换文件 `example.env` 内的 `APPID` 和 `KEY` 为你申请的应用信息, [百度翻译开放平台](https://fanyi-api.baidu.com/manage/developer)能找到. 替换后保存, 重命名此文件为 `working.env`. / 使用**腾讯翻译**则为 `TENCENTID` 和 `TENCENTKEY`（强烈建议用腾讯翻译，开通[机器翻译](https://console.cloud.tencent.com/tmt)后到[API 密钥管理](https://console.cloud.tencent.com/cam/capi)查看`SecretId`和`SecretKey`）.
+
+- 证书：进入 `certs` 文件夹，该文件夹下有一个 `mkcert-v1.4.4-xxx.exe`，如果你运行不了或者怕病毒，可以去 https://github.com/FiloSottile/mkcert/releases 下载一个。在此文件夹打开命令行（Shift+右键，打开 Powershell），然后运行下面的命令：
+
+```bash
+mkcert-v1.4.4-windows-amd64.exe trs.cirno.biz
+mkcert-v1.4.4-windows-amd64.exe -install
+```
 
-- 安装 `certs/trs.cirno.biz.crt` 到 `个人` (双击打开->安装证书->存储位置:当前用户->将所有的证书都放入下列存储:个人->完成). 你也可以用[此项目](https://github.com/kingkool68/generate-ssl-certs-for-local-development)自己生成.
+> 命令会在文件夹中生成 `trs.cirno.biz.pem` 和 `trs.cirno.biz-key.pem`，代码中已经正确引用该文件名。另外在 `-install` 时会弹窗，点确定即可，这是为了 windows 能信任该证书。
 
 ### 运行服务
 
@@ -41,8 +49,6 @@ npm start   # 先配置好再运行服务
 
 服务启动完成打开工具 `nw.exe`.
 
-首次使用此项目时, 由于使用了自签证书, 请求会失败 (更新那里会显示 Failed to fetch). 在工具里右键空白处点击检查, 在 `Console` 标签页会显示红色的报错, 点链接, 选显示更多继续访问. 之后只要不再换证书就不会再请求失败了.
-
 ---
 
 ### 副作用
diff --git a/src/index.js b/src/index.js
index 8c58b99..62dbd71 100644
--- a/src/index.js
+++ b/src/index.js
@@ -12,8 +12,8 @@ const app = new Koa();
 const router = new Router();
 
 const options = {
-  key: fs.readFileSync("certs/trs.cirno.biz.key").toString(),
-  cert: fs.readFileSync("certs/trs.cirno.biz.crt").toString(),
+  key: fs.readFileSync("certs/trs.cirno.biz-key.pem").toString(),
+  cert: fs.readFileSync("certs/trs.cirno.biz.pem").toString(),
 };
 
 app.use(logger());