diff --git a/packages/monorepo-utils/package.json b/packages/monorepo-utils/package.json
index 98aec2092f..63f243045b 100644
--- a/packages/monorepo-utils/package.json
+++ b/packages/monorepo-utils/package.json
@@ -30,8 +30,7 @@
     "@types/js-yaml": "^4.0.6",
     "fast-glob": "^3.3.1",
     "js-yaml": "^4.1.0",
-    "json5": "^2.2.3",
-    "p-map": "^4.0.0"
+    "json5": "^2.2.3"
   },
   "devDependencies": {
     "@types/node": "16.x",
diff --git a/packages/monorepo-utils/src/common/pnpm.ts b/packages/monorepo-utils/src/common/pnpm.ts
index 633e2c6b37..6c60a28aa2 100644
--- a/packages/monorepo-utils/src/common/pnpm.ts
+++ b/packages/monorepo-utils/src/common/pnpm.ts
@@ -2,7 +2,6 @@ import path from 'path';
 import { fse } from '@rsbuild/shared';
 import { load } from 'js-yaml';
 import glob, { type Options as GlobOptions } from 'fast-glob';
-import pMap from 'p-map';
 import { Project } from '../project/project';
 import { PNPM_WORKSPACE_FILE, PACKAGE_JSON } from '../constants';
 import { readPackageJson } from '../utils';
@@ -43,13 +42,10 @@ export const makeFileFinder = (rootPath: string, patterns: string[]) => {
   return async <FileMapperType>(
     fileName: string,
     fileMapper: (filepath: string[]) => Promise<FileMapperType[]>,
-    customGlobOpts: GlobOptions = {},
   ) => {
-    const options = { ...customGlobOpts, ...globOpts };
-
     let result = await glob(
       patterns.map((globPath) => path.posix.join(globPath, fileName)),
-      options,
+      globOpts,
     );
 
     // fast-glob does not respect pattern order, so we re-sort by absolute path
@@ -57,7 +53,7 @@ export const makeFileFinder = (rootPath: string, patterns: string[]) => {
     // POSIX results always need to be normalized
     result = normalize(result);
 
-    return await fileMapper(result);
+    return fileMapper(result);
   };
 };
 
@@ -73,14 +69,11 @@ export const readPnpmProjects = async (
       manifest: pkgJson,
     };
   };
-  const projects = await finder(
-    PACKAGE_JSON,
-    (filePaths) =>
-      pMap(filePaths, mapper, {
-        concurrency: filePaths.length || Infinity,
-      }),
-    {},
+
+  const projects = await finder(PACKAGE_JSON, (filePaths) =>
+    Promise.all(filePaths.map(mapper)),
   );
+
   return projects;
 };
 
diff --git a/packages/monorepo-utils/src/utils.ts b/packages/monorepo-utils/src/utils.ts
index da63b4c8d1..d95162fc27 100644
--- a/packages/monorepo-utils/src/utils.ts
+++ b/packages/monorepo-utils/src/utils.ts
@@ -1,16 +1,11 @@
 import path from 'path';
 import { fse } from '@rsbuild/shared';
 import json5 from 'json5';
-import { PACKAGE_JSON, RUSH_JSON_FILE } from './constants';
+import { RUSH_JSON_FILE } from './constants';
 import type { INodePackageJson, IRushConfig } from './types';
 
 export const readPackageJson = async (pkgJsonFilePath: string) => {
-  const packageJson = readJson<INodePackageJson>(
-    pkgJsonFilePath.includes(PACKAGE_JSON)
-      ? pkgJsonFilePath
-      : path.join(pkgJsonFilePath, PACKAGE_JSON),
-  );
-  return packageJson;
+  return readJson<INodePackageJson>(pkgJsonFilePath);
 };
 
 export const readRushJson = async (rushJsonFilePath: string) => {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 0a32ebe298..487bfdfb00 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -949,9 +949,6 @@ importers:
       json5:
         specifier: ^2.2.3
         version: 2.2.3
-      p-map:
-        specifier: ^4.0.0
-        version: 4.0.0
     devDependencies:
       '@types/node':
         specifier: 16.x
@@ -6077,14 +6074,6 @@ packages:
     engines: {node: '>=0.4.0'}
     hasBin: true
 
-  /aggregate-error@3.1.0:
-    resolution: {integrity: sha512-4I7Td01quW/RpocfNayFdFVk1qSuoh0E7JrbRJ16nH01HhKFQ88INq9Sd+nd72zqRySlr9BmDA8xlEJ6vJMrYA==}
-    engines: {node: '>=8'}
-    dependencies:
-      clean-stack: 2.2.0
-      indent-string: 4.0.0
-    dev: false
-
   /ajv-formats@2.1.1(ajv@8.12.0):
     resolution: {integrity: sha512-Wx0Kx52hxE7C18hkMEggYlEifqWZtYaRgouJor+WMdPnQyEK13vgEWyVNup7SoeeoLMsr4kf5h6dOW11I15MUA==}
     peerDependencies:
@@ -6804,11 +6793,6 @@ packages:
       safe-buffer: 5.2.1
     dev: false
 
-  /clean-stack@2.2.0:
-    resolution: {integrity: sha512-4diC9HaTE+KRAMWhDhrGOECgWZxoevMc5TlkObMqNSsVU62PYzXZ/SMTjzyGAFF1YusgxGcSWTEXBhp0CPwQ1A==}
-    engines: {node: '>=6'}
-    dev: false
-
   /cli-cursor@3.1.0:
     resolution: {integrity: sha512-I/zHAwsKf9FqGoXM4WWRACob9+SNukZTd94DWF57E4toouRulbCxcUh6RKUEOQlYTHJnzkPMySvPNaaSLNfLZw==}
     engines: {node: '>=8'}
@@ -9107,6 +9091,7 @@ packages:
   /indent-string@4.0.0:
     resolution: {integrity: sha512-EdDDZu4A2OyIK7Lr/2zG+w5jmbuk1DVBnEwREQvBzspBJkCEbRa8GxU1lghYcaGJCnRWibjDXlq779X1/y5xwg==}
     engines: {node: '>=8'}
+    dev: true
 
   /inflight@1.0.6:
     resolution: {integrity: sha512-k92I/b08q4wvFscXCLvqfsHCrjrF7yiXsQuIVvVE7N82W3+aqpzuUdBbfhWcy/FZR3/4IgflMgKLOsvPDrGCJA==}
@@ -11039,13 +11024,6 @@ packages:
     resolution: {integrity: sha512-y3b8Kpd8OAN444hxfBbFfj1FY/RjtTd8tzYwhUqNYXx0fXx2iX4maP4Qr6qhIKbQXI02wTLAda4fYUbDagTUFw==}
     engines: {node: '>=6'}
 
-  /p-map@4.0.0:
-    resolution: {integrity: sha512-/bjOqmgETBYB5BoEeGVea8dmvHb2m9GLy1E9W43yeyfP6QQCZGFNa+XRceJEuDB6zqr+gKpIAmlLebMpykw/MQ==}
-    engines: {node: '>=10'}
-    dependencies:
-      aggregate-error: 3.1.0
-    dev: false
-
   /p-try@2.2.0:
     resolution: {integrity: sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==}
     engines: {node: '>=6'}