diff --git a/package-lock.json b/package-lock.json
index 45fb8d17..e899f2c2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -65,7 +65,6 @@
         "eslint-plugin-unicorn": "^56.0.1",
         "express": "^4.21.2",
         "fast-plist": "^0.1.3",
-        "get-stdin": "^9.0.0",
         "globals": "^15.14.0",
         "globby": "^14.0.2",
         "image-size": "^1.2.0",
@@ -8651,19 +8650,6 @@
         "node": ">=8.0.0"
       }
     },
-    "node_modules/get-stdin": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-9.0.0.tgz",
-      "integrity": "sha512-dVKBjfWisLAicarI2Sf+JuBE/DghV4UzNAVe9yhEJuzeREd3JhOTE9cUaJTeSa77fsbQUK3pcOpJfM59+VKZaA==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
     "node_modules/get-stream": {
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-6.0.1.tgz",
diff --git a/package.json b/package.json
index 37856ff5..1875a41e 100644
--- a/package.json
+++ b/package.json
@@ -109,7 +109,6 @@
     "eslint-plugin-unicorn": "^56.0.1",
     "express": "^4.21.2",
     "fast-plist": "^0.1.3",
-    "get-stdin": "^9.0.0",
     "globals": "^15.14.0",
     "globby": "^14.0.2",
     "image-size": "^1.2.0",
diff --git a/src/file.ts b/src/file.ts
index a50b54b3..21787964 100644
--- a/src/file.ts
+++ b/src/file.ts
@@ -1,44 +1,14 @@
 /* eslint-disable @typescript-eslint/no-namespace */
 import fs from 'node:fs'
 import path from 'node:path'
-import { setTimeout as setTimeoutPromise } from 'node:timers/promises'
 import * as url from 'node:url'
-import chalk from 'chalk'
-import _getStdin from 'get-stdin'
 import { globby, Options as GlobbyOptions } from 'globby'
-import { info } from './cli'
 import { debug } from './utils/debug'
+import { getStdin } from './utils/stdin'
 import { generateTmpName } from './utils/tmp'
 
 export const markdownExtensions = ['md', 'mdown', 'markdown', 'markdn']
 
-const STDIN_NOTICE_DELAY = 3000
-
-const getStdin = async () => {
-  const delayedNoticeController = new AbortController()
-
-  setTimeoutPromise(STDIN_NOTICE_DELAY, null, {
-    ref: false,
-    signal: delayedNoticeController.signal,
-  })
-    .then(() => {
-      info(
-        `Currently waiting data from stdin stream. Conversion will start after finished reading. (Pass ${chalk.yellow`--no-stdin`} option if it was not intended)`
-      )
-    })
-    .catch(() => {
-      // No ops
-    })
-
-  debug('Reading stdin stream...')
-  const buf = await _getStdin.buffer()
-
-  debug('Read from stdin: %d bytes', buf.length)
-  delayedNoticeController.abort()
-
-  return buf
-}
-
 interface GenerateTmpFileInterfaceOptions {
   extension?: `.${string}`
 }
diff --git a/src/utils/stdin.ts b/src/utils/stdin.ts
new file mode 100644
index 00000000..d22d4e0f
--- /dev/null
+++ b/src/utils/stdin.ts
@@ -0,0 +1,34 @@
+import streamConsumers from 'node:stream/consumers'
+import { setTimeout as setTimeoutPromise } from 'node:timers/promises'
+import chalk from 'chalk'
+import { info } from '../cli'
+import { debug } from './debug'
+
+const STDIN_NOTICE_DELAY = 3000
+
+export const getStdin = async (): Promise<Buffer> => {
+  if (process.stdin.isTTY) return Buffer.alloc(0)
+
+  const delayedNoticeController = new AbortController()
+
+  setTimeoutPromise(STDIN_NOTICE_DELAY, null, {
+    ref: false,
+    signal: delayedNoticeController.signal,
+  })
+    .then(() => {
+      info(
+        `Currently waiting data from stdin stream. Conversion will start after finished reading. (Pass ${chalk.yellow`--no-stdin`} option if it was not intended)`
+      )
+    })
+    .catch(() => {
+      // No ops
+    })
+
+  debug('Reading stdin stream...')
+  const buf = await streamConsumers.buffer(process.stdin)
+
+  debug('Read from stdin: %d bytes', buf.length)
+  delayedNoticeController.abort()
+
+  return buf
+}
diff --git a/test/__mocks__/get-stdin.ts b/test/__mocks__/get-stdin.ts
deleted file mode 100644
index 7adc1e46..00000000
--- a/test/__mocks__/get-stdin.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-const getStdin = Object.assign(async () => '', {
-  buffer: async () => Buffer.from(''),
-})
-
-export default getStdin
diff --git a/test/index.ts b/test/index.ts
index 3f15c9c2..ac3171d2 100644
--- a/test/index.ts
+++ b/test/index.ts
@@ -1,7 +1,7 @@
 import path from 'node:path'
-import getStdin from 'get-stdin'
 import api, { CLIError } from '../src/index'
 import * as marpCli from '../src/marp-cli'
+import * as stdin from '../src/utils/stdin'
 
 afterEach(() => {
   jest.clearAllMocks()
@@ -27,7 +27,7 @@ describe('Marp CLI API interface', () => {
   it('does not read input from stdin if called API', async () => {
     jest.spyOn(console, 'log').mockImplementation()
 
-    const stdinBuffer = jest.spyOn(getStdin, 'buffer')
+    const stdinBuffer = jest.spyOn(stdin, 'getStdin')
 
     await marpCli.cliInterface([])
     expect(stdinBuffer).toHaveBeenCalled()
diff --git a/test/marp-cli.ts b/test/marp-cli.ts
index 8ec7e0ca..917a6fe0 100644
--- a/test/marp-cli.ts
+++ b/test/marp-cli.ts
@@ -4,7 +4,6 @@ import path from 'node:path'
 import { version as coreVersion } from '@marp-team/marp-core/package.json'
 import { version as marpitVersion } from '@marp-team/marpit/package.json'
 import * as cosmiconfigExplorer from 'cosmiconfig/dist/Explorer' // eslint-disable-line import-x/namespace
-import getStdin from 'get-stdin'
 import stripAnsi from 'strip-ansi'
 import { version as cliVersion } from '../package.json'
 import { defaultFinders } from '../src/browser/finder'
@@ -22,6 +21,7 @@ import { Preview } from '../src/preview'
 import { Server } from '../src/server'
 import { ThemeSet } from '../src/theme'
 import * as container from '../src/utils/container'
+import * as stdin from '../src/utils/stdin'
 import * as version from '../src/version'
 import { Watcher } from '../src/watcher'
 
@@ -1752,9 +1752,7 @@ describe('Marp CLI', () => {
       cliInfo = jest.spyOn(cli, 'info').mockImplementation()
       stdout = jest.spyOn(process.stdout, 'write').mockImplementation()
 
-      jest
-        .spyOn(getStdin, 'buffer')
-        .mockResolvedValue(Buffer.from('# markdown'))
+      jest.spyOn(stdin, 'getStdin').mockResolvedValue(Buffer.from('# markdown'))
 
       // reset cached stdin buffer
       ;(File as any).stdinBuffer = undefined