diff --git a/package.json b/package.json
index 1ce49b9f..46b94dca 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,6 @@
     "consola": "^3.2.3",
     "debug": "^4.3.7",
     "esbuild": "^0.23.1",
-    "execa": "^5.1.1",
     "joycon": "^3.1.1",
     "picocolors": "^1.1.0",
     "postcss-load-config": "^6.0.1",
@@ -66,6 +65,7 @@
     "rollup": "^4.21.3",
     "source-map": "0.8.0-beta.0",
     "sucrase": "^3.35.0",
+    "tinyexec": "^0.3.0",
     "tinyglobby": "^0.2.6",
     "tree-kill": "^1.2.2"
   },
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 66a7fff7..1138e457 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -26,9 +26,6 @@ importers:
       esbuild:
         specifier: ^0.23.1
         version: 0.23.1
-      execa:
-        specifier: ^5.1.1
-        version: 5.1.1
       joycon:
         specifier: ^3.1.1
         version: 3.1.1
@@ -50,6 +47,9 @@ importers:
       sucrase:
         specifier: ^3.35.0
         version: 3.35.0
+      tinyexec:
+        specifier: ^0.3.0
+        version: 0.3.0
       tinyglobby:
         specifier: ^0.2.6
         version: 0.2.6
diff --git a/src/errors.ts b/src/errors.ts
index d6b2dde6..7aa0906c 100644
--- a/src/errors.ts
+++ b/src/errors.ts
@@ -1,5 +1,5 @@
 import { isMainThread, parentPort } from 'node:worker_threads'
-import * as colors from 'picocolors'
+import colors from 'picocolors'
 
 export class PrettyError extends Error {
   constructor(message: string) {
diff --git a/src/index.ts b/src/index.ts
index 2b694159..425832b5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2,7 +2,7 @@ import path from 'node:path'
 import fs from 'node:fs'
 import { Worker } from 'node:worker_threads'
 import { loadTsConfig } from 'bundle-require'
-import execa from 'execa'
+import { exec, type Result as ExecChild } from 'tinyexec'
 import { glob } from 'tinyglobby'
 import kill from 'tree-kill'
 import { version } from '../package.json'
@@ -28,7 +28,6 @@ import { terserPlugin } from './plugins/terser'
 import { runTypeScriptCompiler } from './tsc'
 import { runDtsRollup } from './api-extractor'
 import { cjsInterop } from './plugins/cjs-interop'
-import type { ChildProcess } from 'node:child_process'
 import type { Format, KILL_SIGNAL, NormalizedOptions, Options } from './options'
 
 export type { Format, Options, NormalizedOptions }
@@ -272,7 +271,7 @@ export async function build(_options: Options) {
 
         const mainTasks = async () => {
           if (!options.dts?.only) {
-            let onSuccessProcess: ChildProcess | undefined
+            let onSuccessProcess: ExecChild | undefined
             let onSuccessCleanup: (() => any) | undefined | void
             /** Files imported by the entry */
             const buildDependencies: Set<string> = new Set()
@@ -365,15 +364,17 @@ export async function build(_options: Options) {
                 if (typeof options.onSuccess === 'function') {
                   onSuccessCleanup = await options.onSuccess()
                 } else {
-                  onSuccessProcess = execa(options.onSuccess, {
-                    shell: true,
-                    stdio: 'inherit',
-                  })
-                  onSuccessProcess.on('exit', (code) => {
-                    if (code && code !== 0) {
-                      process.exitCode = code
-                    }
+                  onSuccessProcess = exec(options.onSuccess, [], {
+                    nodeOptions: { shell: true, stdio: 'inherit' },
                   })
+
+                  await onSuccessProcess
+                  if (
+                    onSuccessProcess.exitCode &&
+                    onSuccessProcess.exitCode !== 0
+                  ) {
+                    process.exitCode = onSuccessProcess.exitCode
+                  }
                 }
               }
             }
diff --git a/src/lib/report-size.ts b/src/lib/report-size.ts
index efd841e2..6603df7f 100644
--- a/src/lib/report-size.ts
+++ b/src/lib/report-size.ts
@@ -1,4 +1,4 @@
-import * as colors from 'picocolors'
+import colors from 'picocolors'
 import type { Logger } from '../log'
 
 const prettyBytes = (bytes: number) => {
diff --git a/src/log.ts b/src/log.ts
index 0a8565e9..5a88191c 100644
--- a/src/log.ts
+++ b/src/log.ts
@@ -1,6 +1,6 @@
 import util from 'node:util'
 import { isMainThread, parentPort } from 'node:worker_threads'
-import * as colors from 'picocolors'
+import colors from 'picocolors'
 
 type LOG_TYPE = 'info' | 'success' | 'error' | 'warn'
 
diff --git a/test/utils.ts b/test/utils.ts
index ca9e702c..1bce118f 100644
--- a/test/utils.ts
+++ b/test/utils.ts
@@ -3,7 +3,7 @@ import fsp from 'node:fs/promises'
 import path from 'node:path'
 import { fileURLToPath } from 'node:url'
 import { expect } from 'vitest'
-import execa from 'execa'
+import { exec } from 'tinyexec'
 import { glob } from 'tinyglobby'
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url))
@@ -48,16 +48,16 @@ export async function run(
   const entry = options.entry || ['input.ts']
 
   // Run tsup cli
-  const { exitCode, stdout, stderr } = await execa(
-    bin,
-    [...entry, ...(options.flags || [])],
-    {
+  const processPromise = exec(bin, [...entry, ...(options.flags || [])], {
+    nodeOptions: {
       cwd: testDir,
       env: { ...process.env, ...options.env },
     },
-  )
+  })
+  const { stdout, stderr } = await processPromise
+
   const logs = stdout + stderr
-  if (exitCode !== 0) {
+  if (processPromise.exitCode !== 0) {
     throw new Error(logs)
   }
 
diff --git a/vitest-global.ts b/vitest-global.ts
index 90f7b3bd..5bda97a6 100644
--- a/vitest-global.ts
+++ b/vitest-global.ts
@@ -1,12 +1,12 @@
 import path from 'node:path'
 import fs from 'node:fs/promises'
-import execa from 'execa'
+import { exec } from 'tinyexec'
 
 export default async function setup() {
   const testDir = path.resolve(__dirname, 'test')
   const cacheDir = path.resolve(testDir, '.cache')
   await fs.rm(cacheDir, { recursive: true, force: true })
   console.log(`Installing dependencies in ./test folder`)
-  await execa('pnpm', ['i'], { cwd: testDir })
+  await exec('pnpm', ['i'], { nodeOptions: { cwd: testDir } })
   console.log(`Done... start testing..`)
 }