diff --git a/build/Gruntfile.js b/build/Gruntfile.js
index cdffd45a3..f3e16b586 100644
--- a/build/Gruntfile.js
+++ b/build/Gruntfile.js
@@ -60,6 +60,14 @@ module.exports = function(grunt) {
                     to: process.env['PLUGIN_LINK_MACROS'] || 'https://api.onlyoffice.com/plugin/macros'
                 }];
 
+    let path = require('path');
+    let addons = grunt.option('addon') || [];
+    if (!Array.isArray(addons))
+        addons = [addons];
+
+    addons.forEach((element,index,self) => self[index] = '../../web-apps-' + element + '/build');
+    addons = addons.filter(element => grunt.file.isDir(element));
+
     grunt.loadNpmTasks('grunt-contrib-clean');
     grunt.loadNpmTasks('grunt-contrib-copy');
     grunt.loadNpmTasks('grunt-contrib-uglify');
@@ -134,6 +142,14 @@ module.exports = function(grunt) {
             if (packageFile) {
                 grunt.log.ok(appName + ' config loaded successfully'.green);
 
+                addons.forEach(element => {
+                    let _path = path.join(element,configFile);
+                    if (grunt.file.exists(_path)) {
+                        _merge(packageFile, require(_path));
+                        grunt.log.ok('addon '.green + element + ' is merged successfully'.green);
+                    }
+                });
+
                 if ( !!_extConfig && _extConfig.name == packageFile.name ) {
                     _merge(packageFile, _extConfig);
                 }