diff --git a/README.md b/README.md
index e8d47b71..be3c4480 100644
--- a/README.md
+++ b/README.md
@@ -8,8 +8,12 @@ In the component's `composer.json`, specify:
 
 *   `type`, type of Magento 2 component.
 *   `extra/map`, list of files to move and their paths relative to the Magento root directory.
+*   `extra/chmod`, list of permissions that should be set for files.
+
+    **Note**:
+    * `extra/map` is required only if your component needs to be moved to a location other than `<Magento root>/vendor`. Otherwise, omit this section.
+    * `extra/chmod` is required only if you need to set specific permissions for files.
 
-    **Note**: `extra/map` is required only if your component needs to be moved to a location other than `<Magento root>/vendor`. Otherwise, omit this section.
 
 ## Supported Components
 The following list explains the use of `type` in `composer.json`.
@@ -165,5 +169,38 @@ The Magneto Composer Installer uses the `copy` deployment strategy. It copies ea
 
 There are [other deployment strategies](https://github.com/magento/magento-composer-installer/blob/master/doc/Deploy.md) that could be used; however, we don't guarantee that any of them will work.
 
+## Usage `extra/chmod`
+
+The following example shows how you can set specific permissions for files.
+
+Example:
+
+```json
+{
+    "name": "magento/module-sample",
+    "description": "N/A",
+    "require": {
+        ...
+    },
+    "type": "magento2-module",
+    "extra": {
+         "chmod": [
+            {
+                "mask": "0755",
+                "path": "bin/magento"
+            },
+            {
+                "mask": "0644",
+                "path": "some_dir/file.jpg"
+            }
+        ]
+    }
+}
+```
+
+`mask` is a bit mask for chmod command
+
+`path` is a path to file relative to the Magento root folder
+
 # Notes
 - The extra->magento-root-dir option is no longer supported. It displays only to preseve backward compatibility.
\ No newline at end of file
diff --git a/src/MagentoHackathon/Composer/Magento/Plugin.php b/src/MagentoHackathon/Composer/Magento/Plugin.php
index ec845f72..234bdb50 100644
--- a/src/MagentoHackathon/Composer/Magento/Plugin.php
+++ b/src/MagentoHackathon/Composer/Magento/Plugin.php
@@ -157,8 +157,51 @@ public function onNewCodeEvent(\Composer\Script\Event $event)
         $this->deployLibraries();
         $this->saveVendorDirPath($event->getComposer());
         $this->requestRegeneration();
+        $this->setFilePermissions();
     }
 
+    /**
+     * Set permissions for files using extra->chmod from composer.json
+     *
+     * @return void
+     */
+    private function setFilePermissions()
+    {
+        $packages = $this->composer->getRepositoryManager()->getLocalRepository()->getPackages();
+        $message = 'Check "chmod" section in composer.json of %s package.';
+
+        foreach ($packages as $package) {
+            $extra = $package->getExtra();
+            if (!isset($extra['chmod']) || !is_array($extra['chmod'])) {
+                continue;
+            }
+
+            $error = false;
+            foreach ($extra['chmod'] as $chmod) {
+                if (!isset($chmod['mask']) || !isset($chmod['path']) || strpos($chmod['path'], '..') !== false) {
+                    $error = true;
+                    continue;
+                }
+
+                $file = $this->installer->getTargetDir() . '/' . $chmod['path'];
+                if (file_exists($file)) {
+                    chmod($file, octdec($chmod['mask']));
+                } else {
+                    $this->io->writeError([
+                        'File doesn\'t exist: ' . $chmod['path'],
+                        sprintf($message, $package->getName())
+                    ]);
+                }
+            }
+
+            if ($error) {
+                $this->io->writeError([
+                    'Incorrect mask or file path.',
+                    sprintf($message, $package->getName())
+                ]);
+            }
+        }
+    }
 
     protected function deployLibraries()
     {