diff --git a/composer.json b/composer.json
index 224b60fe..79169fb3 100644
--- a/composer.json
+++ b/composer.json
@@ -58,7 +58,7 @@
     "codeception/codeception":         "2.2.*",
     "phpmd/phpmd":                     "2.5.*",
     "sebastian/phpcpd":                "2.0.*",
-    "squizlabs/php_codesniffer":       "2.7.*",
+    "squizlabs/php_codesniffer":       "2.8.*",
     "block8/php-docblock-checker":     "1.0.*",
     "phploc/phploc":                   "3.0.*",
     "jakub-onderka/php-parallel-lint": "0.9.*",
diff --git a/composer.lock b/composer.lock
index a4abe1dc..a7342957 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "8495a1c94378951a171dc1521f2af241",
+    "content-hash": "6456340c05b0354ef9c70d9f2df85a17",
     "packages": [
         {
             "name": "behat/gherkin",
@@ -816,16 +816,16 @@
         },
         {
             "name": "myclabs/deep-copy",
-            "version": "1.6.0",
+            "version": "1.6.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/myclabs/DeepCopy.git",
-                "reference": "5a5a9fc8025a08d8919be87d6884d5a92520cefe"
+                "reference": "8e6e04167378abf1ddb4d3522d8755c5fd90d102"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/5a5a9fc8025a08d8919be87d6884d5a92520cefe",
-                "reference": "5a5a9fc8025a08d8919be87d6884d5a92520cefe",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/8e6e04167378abf1ddb4d3522d8755c5fd90d102",
+                "reference": "8e6e04167378abf1ddb4d3522d8755c5fd90d102",
                 "shasum": ""
             },
             "require": {
@@ -854,7 +854,7 @@
                 "object",
                 "object graph"
             ],
-            "time": "2017-01-26T22:05:40+00:00"
+            "time": "2017-04-12T18:52:22+00:00"
         },
         {
             "name": "npm-asset/codemirror",
@@ -2633,16 +2633,16 @@
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "2.7.1",
+            "version": "2.8.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
-                "reference": "9b324f3a1132459a7274a0ace2e1b766ba80930f"
+                "reference": "d7cf0d894e8aa4c73712ee4a331cc1eaa37cdc7d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/9b324f3a1132459a7274a0ace2e1b766ba80930f",
-                "reference": "9b324f3a1132459a7274a0ace2e1b766ba80930f",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/d7cf0d894e8aa4c73712ee4a331cc1eaa37cdc7d",
+                "reference": "d7cf0d894e8aa4c73712ee4a331cc1eaa37cdc7d",
                 "shasum": ""
             },
             "require": {
@@ -2707,7 +2707,7 @@
                 "phpcs",
                 "standards"
             ],
-            "time": "2016-11-30T04:02:31+00:00"
+            "time": "2017-03-01T22:17:45+00:00"
         },
         {
             "name": "stecman/symfony-console-completion",
@@ -3525,16 +3525,16 @@
         },
         {
             "name": "theseer/fdomdocument",
-            "version": "1.6.1",
+            "version": "1.6.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/theseer/fDOMDocument.git",
-                "reference": "d9ad139d6c2e8edf5e313ffbe37ff13344cf0684"
+                "reference": "cf219ede922fb47956726f35e2127277ebd302ca"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/theseer/fDOMDocument/zipball/d9ad139d6c2e8edf5e313ffbe37ff13344cf0684",
-                "reference": "d9ad139d6c2e8edf5e313ffbe37ff13344cf0684",
+                "url": "https://api.github.com/repos/theseer/fDOMDocument/zipball/cf219ede922fb47956726f35e2127277ebd302ca",
+                "reference": "cf219ede922fb47956726f35e2127277ebd302ca",
                 "shasum": ""
             },
             "require": {
@@ -3561,7 +3561,7 @@
             ],
             "description": "The classes contained within this repository extend the standard DOM to use exceptions at all occasions of errors instead of PHP warnings or notices. They also add various custom methods and shortcuts for convenience and to simplify the usage of DOM.",
             "homepage": "https://github.com/theseer/fDOMDocument",
-            "time": "2015-05-27T22:58:02+00:00"
+            "time": "2017-04-17T09:08:13+00:00"
         },
         {
             "name": "webmozart/assert",