diff --git a/docs/guide/browser-compatibility.md b/docs/guide/browser-compatibility.md
index d17f830cef..64f39c3b5e 100644
--- a/docs/guide/browser-compatibility.md
+++ b/docs/guide/browser-compatibility.md
@@ -71,13 +71,6 @@ For a Hello World app, the modern bundle is already 16% smaller. In production,
 ::: tip
 `<script type="module">` is loaded [with CORS always enabled](https://jakearchibald.com/2017/es-modules-in-browsers/#always-cors). This means your server must return valid CORS headers such as `Access-Control-Allow-Origin: *`. If you want to fetch the scripts with credentials, set the [crossorigin](../config/#crossorigin) option to `use-credentials`.
 
-Also, modern mode uses an inline script to avoid Safari 10 loading both bundles, so if you are using a strict CSP, you will need to explicitly allow the inline script with:
-
-```
-Content-Security-Policy: script-src 'self' 'sha256-4RS22DYeB7U14dra4KcQYxmwt5HkOInieXK1NUMBmQI='
-```
-:::
-
 ::: tip Detecting the Current Mode in Config
 Sometimes you may need to change the webpack config only for the legacy build, or only for the modern build.
 
diff --git a/docs/guide/cli-service.md b/docs/guide/cli-service.md
index a5e3a90111..aad50a542a 100644
--- a/docs/guide/cli-service.md
+++ b/docs/guide/cli-service.md
@@ -75,7 +75,6 @@ Options:
   --mode         specify env mode (default: production)
   --dest         specify output directory (default: dist)
   --modern       build app targeting modern browsers with auto fallback
-  --no-unsafe-inline build app without introducing inline scripts
   --target       app | lib | wc | wc-async (default: app)
   --formats      list of output formats for library builds (default: commonjs,umd,umd-min)
   --inline-vue   include the Vue module in the final bundle of library or web component target
diff --git a/docs/zh/guide/browser-compatibility.md b/docs/zh/guide/browser-compatibility.md
index 8ef813ab35..8443191d61 100644
--- a/docs/zh/guide/browser-compatibility.md
+++ b/docs/zh/guide/browser-compatibility.md
@@ -71,13 +71,6 @@ Vue CLI 会产生两个应用的版本：一个现代版的包，面向支持 [E
 ::: tip 提示
 `<script type="module">` [需要配合始终开启的 CORS 进行加载](https://jakearchibald.com/2017/es-modules-in-browsers/#always-cors)。这意味着你的服务器必须返回诸如 `Access-Control-Allow-Origin: *` 的有效的 CORS 头。如果你想要通过认证来获取脚本，可使将 [crossorigin](../config/#crossorigin) 选项设置为 `use-credentials`。
 
-同时，现代浏览器使用一段内联脚本来避免 Safari 10 重复加载脚本包，所以如果你在使用一套严格的 CSP，你需要这样显性地允许内联脚本：
-
-```
-Content-Security-Policy: script-src 'self' 'sha256-4RS22DYeB7U14dra4KcQYxmwt5HkOInieXK1NUMBmQI='
-```
-:::
-
 [autoprefixer]: https://github.com/postcss/autoprefixer
 [babel-preset-env]: https://new.babeljs.io/docs/en/next/babel-preset-env.html
 [babel-preset-app]: https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/babel-preset-app
diff --git a/packages/@vue/cli-service/__tests__/modernMode.spec.js b/packages/@vue/cli-service/__tests__/modernMode.spec.js
index 1be69c300d..a2995484fb 100644
--- a/packages/@vue/cli-service/__tests__/modernMode.spec.js
+++ b/packages/@vue/cli-service/__tests__/modernMode.spec.js
@@ -100,20 +100,14 @@ test('should inject nomodule-fix script when Safari 10 support is required', asy
   pkg.browserslist.push('safari > 10')
   await project.write('package.json', JSON.stringify(pkg, null, 2))
 
-  let { stdout } = await project.run('vue-cli-service build')
-  let index = await project.read('dist/index.html')
-  // should inject Safari 10 nomodule fix as an inline script
-  const { safariFix } = require('../lib/webpack/SafariNomoduleFixPlugin')
-  expect(index).toMatch(`<script>${safariFix}</script>`)
-
-  // `--no-unsafe-inline` option
-  stdout = (await project.run('vue-cli-service build --no-unsafe-inline')).stdout
+  const { stdout } = await project.run('vue-cli-service build')
   expect(stdout).toMatch('Build complete.')
+
   // should output a separate safari-nomodule-fix bundle
   const files = await fs.readdir(path.join(project.dir, 'dist/js'))
   expect(files.some(f => /^safari-nomodule-fix\.js$/.test(f))).toBe(true)
+  const index = await project.read('dist/index.html')
   // should contain no inline scripts in the output html
-  index = await project.read('dist/index.html')
   expect(index).not.toMatch(/[^>]\s*<\/script>/)
 })
 
diff --git a/packages/@vue/cli-service/lib/commands/build/index.js b/packages/@vue/cli-service/lib/commands/build/index.js
index 0b5ff894cd..d7a0db47c1 100644
--- a/packages/@vue/cli-service/lib/commands/build/index.js
+++ b/packages/@vue/cli-service/lib/commands/build/index.js
@@ -2,8 +2,7 @@ const defaults = {
   clean: true,
   target: 'app',
   module: true,
-  formats: 'commonjs,umd,umd-min',
-  'unsafe-inline': true
+  formats: 'commonjs,umd,umd-min'
 }
 
 const buildModes = {
@@ -28,7 +27,6 @@ module.exports = (api, options) => {
       '--mode': `specify env mode (default: production)`,
       '--dest': `specify output directory (default: ${options.outputDir})`,
       '--no-module': `build app without generating <script type="module"> chunks for modern browsers`,
-      '--no-unsafe-inline': `build app without introducing inline scripts`,
       '--target': `app | lib | wc | wc-async (default: ${defaults.target})`,
       '--inline-vue': 'include the Vue module in the final bundle of library or web component target',
       '--formats': `list of output formats for library builds (default: ${defaults.formats})`,
diff --git a/packages/@vue/cli-service/lib/commands/build/resolveAppConfig.js b/packages/@vue/cli-service/lib/commands/build/resolveAppConfig.js
index 3ab09b3000..d990598fa2 100644
--- a/packages/@vue/cli-service/lib/commands/build/resolveAppConfig.js
+++ b/packages/@vue/cli-service/lib/commands/build/resolveAppConfig.js
@@ -24,17 +24,16 @@ module.exports = (api, args, options) => {
     if (!args.moduleBuild) {
       // Inject plugin to extract build stats and write to disk
       config
-      .plugin('modern-mode-legacy')
-      .use(ModernModePlugin, [{
-        targetDir,
-        isModuleBuild: false
-      }])
+        .plugin('modern-mode-legacy')
+        .use(ModernModePlugin, [{
+          targetDir,
+          isModernBuild: false
+        }])
     } else {
       config
         .plugin('safari-nomodule-fix')
         .use(SafariNomoduleFixPlugin, [{
-          unsafeInline: args['unsafe-inline'],
-          // as we may generate an addition file asset (if `no-unsafe-inline` specified)
+          // as we may generate an addition file asset (if Safari 10 fix is needed)
           // we need to provide the correct directory for that file to place in
           jsDirectory: require('../../util/getAssetPath')(options, 'js')
         }])