diff --git a/composer.json b/composer.json
index 0a8a0eac02..42cad2e725 100644
--- a/composer.json
+++ b/composer.json
@@ -110,6 +110,9 @@
         }
     ],
     "scripts": {
-        "setConfigParams": "php dev/set-config-params.php"
+        "setConfigParams": "php dev/set-config-params.php",
+        "post-install-cmd": [
+            "php dev/vendor-cleanup.php"
+        ]
     }
 }
diff --git a/dev/vendor-cleanup.php b/dev/vendor-cleanup.php
new file mode 100644
index 0000000000..e1edc5623c
--- /dev/null
+++ b/dev/vendor-cleanup.php
@@ -0,0 +1,61 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2024 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+$list = [
+    'vendor/lasserafn/php-initial-avatar-generator/tests',
+    'vendor/lasserafn/php-initial-avatar-generator/src/fonts/script',
+    'vendor/lasserafn/php-initial-avatar-generator/src/fonts/FontAwesome5Brands-Regular-400.otf',
+    'vendor/lasserafn/php-initial-avatar-generator/src/fonts/FontAwesome5Free-Regular-400.otf',
+    'vendor/lasserafn/php-initial-avatar-generator/src/fonts/FontAwesome5Free-Solid-900.otf',
+];
+
+foreach ($list as $path) {
+    if (is_dir($path)) {
+        $files = new RecursiveIteratorIterator(
+            new RecursiveDirectoryIterator($path, FilesystemIterator::SKIP_DOTS),
+            RecursiveIteratorIterator::CHILD_FIRST
+        );
+
+        foreach ($files as $fileinfo) {
+            $fileinfo->isDir() ?
+                rmdir($fileinfo->getRealPath()) :
+                unlink($fileinfo->getRealPath());
+        }
+
+        rmdir($path);
+
+        continue;
+    }
+
+    if (!file_exists($path)) {
+        continue;
+    }
+
+    unlink($path);
+}
diff --git a/js/diff.js b/js/diff.js
index 7e0e902145..62e3cd703e 100644
--- a/js/diff.js
+++ b/js/diff.js
@@ -866,6 +866,8 @@ class Diff
 
         const vendorPath = tempFolderPath + '/new/vendor/';
 
+        cp.execSync(`cp -r ${currentPath}/dev ${tempFolderPath}/new/dev`);
+
         fs.writeFileSync(tempFolderPath + '/new/composer.lock', composerLockNewContents);
         fs.writeFileSync(tempFolderPath + '/new/composer.json', composerNewContents);