diff --git a/lib/postbuild/postbuild.js b/lib/postbuild/postbuild.js
index 6a0d81928..9e7e5301a 100644
--- a/lib/postbuild/postbuild.js
+++ b/lib/postbuild/postbuild.js
@@ -1,9 +1,9 @@
 const { resolve } = require("path");
 const { existsSync, mkdirSync, readFileSync, writeFileSync } = require("fs");
 const rimraf = require("rimraf");
-const grunt = require("grunt");
 const concat = require("concat");
-const { config } = require("../../webpack/attachments")
+const glob = require("glob");
+const { config } = require("../../webpack/attachments");
 
 const dest = resolve(__dirname, '../../dist');
 
@@ -25,10 +25,7 @@ const deleteList = [
     "2.0/fineui_without_normalize.min.js.map",
     "fineui_without_normalize.min.js",
     "fineui_without_normalize.min.js.map",
-].concat(grunt.file.expand({}, [
-    "dist/*.css.map",
-    "dist/**/*.css.map",
-]).map(name => name.replace("dist/", "")));
+].concat(glob.sync("dist/**/*.css.map").map(name => name.replace("dist/", "")));
 
 deleteList.forEach(filename => {
     const sourcefile = resolve(dest, `./${filename}`);
diff --git a/package.json b/package.json
index dec8d418f..a0cd07fa0 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,6 @@
     "express": "4.15.2",
     "fork-ts-checker-webpack-plugin": "1.4.3",
     "glob": "^7.2.0",
-    "grunt": "^1.0.1",
     "html-webpack-plugin": "3.2.0",
     "husky": "^3.1.0",
     "karma": "3.1.4",