diff --git a/composer.lock b/composer.lock
index 01de8e1..6cdd36d 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,7 +1,7 @@
 {
     "_readme": [
         "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
     "content-hash": "3903d883ac6fc768a6d5d74f3f42fe2e",
@@ -1936,16 +1936,16 @@
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "2.8.0",
+            "version": "2.9.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
-                "reference": "86dd55a522238211f9f3631e3361703578941d9a"
+                "reference": "dcbed1074f8244661eecddfc2a675430d8d33f62"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/86dd55a522238211f9f3631e3361703578941d9a",
-                "reference": "86dd55a522238211f9f3631e3361703578941d9a",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/dcbed1074f8244661eecddfc2a675430d8d33f62",
+                "reference": "dcbed1074f8244661eecddfc2a675430d8d33f62",
                 "shasum": ""
             },
             "require": {
@@ -2010,7 +2010,7 @@
                 "phpcs",
                 "standards"
             ],
-            "time": "2017-02-02T03:30:00+00:00"
+            "time": "2017-05-22T02:43:20+00:00"
         },
         {
             "name": "webmozart/assert",