diff --git a/.circleci/config.yml b/.circleci/config.yml
index 159bc0e79..90a8ab5f8 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -14,6 +14,9 @@ workflows:
 php-docker-template: &php-docker-template
   steps:
     - checkout
+    - run:
+        name: validate composer.json
+        command: composer validate
     - run:
         name: install current dependencies
         command: composer install --no-progress
@@ -67,8 +70,11 @@ jobs:
             sudo php /tmp/composer-setup.php --install-dir=/usr/local/bin --filename=composer
       - checkout
       - run:
-          name: update dependencies # the dependencies in composer.lock don't work with 5.5
-          command: composer update --no-progress
+          name: validate composer.json
+          command: composer validate
+      - run:
+          name: install current dependencies
+          command: composer install --no-progress
       - run:
           name: run tests
           command: vendor/bin/phpunit --log-junit ~/phpunit/junit.xml --coverage-text tests
diff --git a/composer.lock b/composer.lock
index 89835076d..30d1b6cd6 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,10 +1,10 @@
 {
     "_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": "ad2c6c29c2c748655900711de6dba807",
+    "content-hash": "ae5fba8f5b84830883d1071f40552206",
     "packages": [
         {
             "name": "monolog/monolog",
@@ -284,35 +284,35 @@
         },
         {
             "name": "doctrine/annotations",
-            "version": "v1.4.0",
+            "version": "v1.2.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/annotations.git",
-                "reference": "54cacc9b81758b14e3ce750f205a393d52339e97"
+                "reference": "f25c8aab83e0c3e976fd7d19875f198ccf2f7535"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/annotations/zipball/54cacc9b81758b14e3ce750f205a393d52339e97",
-                "reference": "54cacc9b81758b14e3ce750f205a393d52339e97",
+                "url": "https://api.github.com/repos/doctrine/annotations/zipball/f25c8aab83e0c3e976fd7d19875f198ccf2f7535",
+                "reference": "f25c8aab83e0c3e976fd7d19875f198ccf2f7535",
                 "shasum": ""
             },
             "require": {
                 "doctrine/lexer": "1.*",
-                "php": "^5.6 || ^7.0"
+                "php": ">=5.3.2"
             },
             "require-dev": {
                 "doctrine/cache": "1.*",
-                "phpunit/phpunit": "^5.7"
+                "phpunit/phpunit": "4.*"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.4.x-dev"
+                    "dev-master": "1.3.x-dev"
                 }
             },
             "autoload": {
-                "psr-4": {
-                    "Doctrine\\Common\\Annotations\\": "lib/Doctrine/Common/Annotations"
+                "psr-0": {
+                    "Doctrine\\Common\\Annotations\\": "lib/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -348,7 +348,7 @@
                 "docblock",
                 "parser"
             ],
-            "time": "2017-02-24T16:22:25+00:00"
+            "time": "2015-08-31T12:32:49+00:00"
         },
         {
             "name": "doctrine/instantiator",
@@ -460,19 +460,20 @@
         },
         {
             "name": "erusev/parsedown",
-            "version": "1.6.4",
+            "version": "1.7.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/erusev/parsedown.git",
-                "reference": "fbe3fe878f4fe69048bb8a52783a09802004f548"
+                "reference": "92e9c27ba0e74b8b028b111d1b6f956a15c01fc1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/erusev/parsedown/zipball/fbe3fe878f4fe69048bb8a52783a09802004f548",
-                "reference": "fbe3fe878f4fe69048bb8a52783a09802004f548",
+                "url": "https://api.github.com/repos/erusev/parsedown/zipball/92e9c27ba0e74b8b028b111d1b6f956a15c01fc1",
+                "reference": "92e9c27ba0e74b8b028b111d1b6f956a15c01fc1",
                 "shasum": ""
             },
             "require": {
+                "ext-mbstring": "*",
                 "php": ">=5.3.0"
             },
             "require-dev": {
@@ -501,20 +502,20 @@
                 "markdown",
                 "parser"
             ],
-            "time": "2017-11-14T20:44:03+00:00"
+            "time": "2018-03-08T01:11:30+00:00"
         },
         {
             "name": "guzzlehttp/guzzle",
-            "version": "6.3.0",
+            "version": "6.3.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/guzzle.git",
-                "reference": "f4db5a78a5ea468d4831de7f0bf9d9415e348699"
+                "reference": "407b0cb880ace85c9b63c5f9551db498cb2d50ba"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/f4db5a78a5ea468d4831de7f0bf9d9415e348699",
-                "reference": "f4db5a78a5ea468d4831de7f0bf9d9415e348699",
+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/407b0cb880ace85c9b63c5f9551db498cb2d50ba",
+                "reference": "407b0cb880ace85c9b63c5f9551db498cb2d50ba",
                 "shasum": ""
             },
             "require": {
@@ -524,7 +525,7 @@
             },
             "require-dev": {
                 "ext-curl": "*",
-                "phpunit/phpunit": "^4.0 || ^5.0",
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.4 || ^7.0",
                 "psr/log": "^1.0"
             },
             "suggest": {
@@ -533,7 +534,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "6.2-dev"
+                    "dev-master": "6.3-dev"
                 }
             },
             "autoload": {
@@ -566,7 +567,7 @@
                 "rest",
                 "web service"
             ],
-            "time": "2017-06-22T18:50:49+00:00"
+            "time": "2018-04-22T15:46:56+00:00"
         },
         {
             "name": "guzzlehttp/promises",
@@ -891,16 +892,16 @@
         },
         {
             "name": "jms/serializer",
-            "version": "1.10.0",
+            "version": "1.11.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/schmittjoh/serializer.git",
-                "reference": "62c7ff6d61f8692eac8be024c542b3d9d0ab8c8a"
+                "reference": "e7c53477ff55c21d1b1db7d062edc050a24f465f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/schmittjoh/serializer/zipball/62c7ff6d61f8692eac8be024c542b3d9d0ab8c8a",
-                "reference": "62c7ff6d61f8692eac8be024c542b3d9d0ab8c8a",
+                "url": "https://api.github.com/repos/schmittjoh/serializer/zipball/e7c53477ff55c21d1b1db7d062edc050a24f465f",
+                "reference": "e7c53477ff55c21d1b1db7d062edc050a24f465f",
                 "shasum": ""
             },
             "require": {
@@ -908,12 +909,11 @@
                 "doctrine/instantiator": "^1.0.3",
                 "jms/metadata": "~1.1",
                 "jms/parser-lib": "1.*",
-                "php": ">=5.5.0",
+                "php": "^5.5|^7.0",
                 "phpcollection/phpcollection": "~0.1",
                 "phpoption/phpoption": "^1.1"
             },
             "conflict": {
-                "jms/serializer-bundle": "<1.2.1",
                 "twig/twig": "<1.12"
             },
             "require-dev": {
@@ -941,7 +941,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.10-dev"
+                    "dev-master": "1.11-dev"
                 }
             },
             "autoload": {
@@ -972,7 +972,7 @@
                 "serialization",
                 "xml"
             ],
-            "time": "2017-11-30T18:23:40+00:00"
+            "time": "2018-02-04T17:48:54+00:00"
         },
         {
             "name": "justinrainbow/json-schema",
@@ -1161,51 +1161,6 @@
             "abandoned": true,
             "time": "2012-08-16T17:13:03+00:00"
         },
-        {
-            "name": "myclabs/deep-copy",
-            "version": "1.7.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/myclabs/DeepCopy.git",
-                "reference": "3b8a3a99ba1f6a3952ac2747d989303cbd6b7a3e"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/3b8a3a99ba1f6a3952ac2747d989303cbd6b7a3e",
-                "reference": "3b8a3a99ba1f6a3952ac2747d989303cbd6b7a3e",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^5.6 || ^7.0"
-            },
-            "require-dev": {
-                "doctrine/collections": "^1.0",
-                "doctrine/common": "^2.6",
-                "phpunit/phpunit": "^4.1"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-4": {
-                    "DeepCopy\\": "src/DeepCopy/"
-                },
-                "files": [
-                    "src/DeepCopy/deep_copy.php"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "description": "Create deep copies (clones) of your objects",
-            "keywords": [
-                "clone",
-                "copy",
-                "duplicate",
-                "object",
-                "object graph"
-            ],
-            "time": "2017-10-19T19:58:43+00:00"
-        },
         {
             "name": "nikic/php-parser",
             "version": "v1.4.1",
@@ -1627,28 +1582,28 @@
         },
         {
             "name": "phpspec/prophecy",
-            "version": "1.7.3",
+            "version": "1.7.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpspec/prophecy.git",
-                "reference": "e4ed002c67da8eceb0eb8ddb8b3847bb53c5c2bf"
+                "reference": "33a7e3c4fda54e912ff6338c48823bd5c0f0b712"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/e4ed002c67da8eceb0eb8ddb8b3847bb53c5c2bf",
-                "reference": "e4ed002c67da8eceb0eb8ddb8b3847bb53c5c2bf",
+                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/33a7e3c4fda54e912ff6338c48823bd5c0f0b712",
+                "reference": "33a7e3c4fda54e912ff6338c48823bd5c0f0b712",
                 "shasum": ""
             },
             "require": {
                 "doctrine/instantiator": "^1.0.2",
                 "php": "^5.3|^7.0",
                 "phpdocumentor/reflection-docblock": "^2.0|^3.0.2|^4.0",
-                "sebastian/comparator": "^1.1|^2.0",
+                "sebastian/comparator": "^1.1|^2.0|^3.0",
                 "sebastian/recursion-context": "^1.0|^2.0|^3.0"
             },
             "require-dev": {
                 "phpspec/phpspec": "^2.5|^3.2",
-                "phpunit/phpunit": "^4.8.35 || ^5.7"
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.5"
             },
             "type": "library",
             "extra": {
@@ -1686,44 +1641,43 @@
                 "spy",
                 "stub"
             ],
-            "time": "2017-11-24T13:59:53+00:00"
+            "time": "2018-04-18T13:57:24+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
-            "version": "3.3.3",
+            "version": "2.2.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
-                "reference": "44cd8e3930e431658d1a5de7d282d5cb37837fd5"
+                "reference": "eabf68b476ac7d0f73793aada060f1c1a9bf8979"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/44cd8e3930e431658d1a5de7d282d5cb37837fd5",
-                "reference": "44cd8e3930e431658d1a5de7d282d5cb37837fd5",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/eabf68b476ac7d0f73793aada060f1c1a9bf8979",
+                "reference": "eabf68b476ac7d0f73793aada060f1c1a9bf8979",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.6 || ^7.0",
+                "php": ">=5.3.3",
                 "phpunit/php-file-iterator": "~1.3",
                 "phpunit/php-text-template": "~1.2",
-                "phpunit/php-token-stream": "^1.4.2",
-                "sebastian/code-unit-reverse-lookup": "~1.0",
+                "phpunit/php-token-stream": "~1.3",
                 "sebastian/environment": "^1.3.2",
-                "sebastian/version": "~1.0|~2.0"
+                "sebastian/version": "~1.0"
             },
             "require-dev": {
                 "ext-xdebug": ">=2.1.4",
-                "phpunit/phpunit": "~5"
+                "phpunit/phpunit": "~4"
             },
             "suggest": {
                 "ext-dom": "*",
-                "ext-xdebug": ">=2.4.0",
+                "ext-xdebug": ">=2.2.1",
                 "ext-xmlwriter": "*"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.3.x-dev"
+                    "dev-master": "2.2.x-dev"
                 }
             },
             "autoload": {
@@ -1749,7 +1703,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2016-05-27T16:24:29+00:00"
+            "time": "2015-10-06T15:47:00+00:00"
         },
         {
             "name": "phpunit/php-file-iterator",
@@ -1939,16 +1893,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "5.3.5",
+            "version": "4.8.36",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "08c513bfcab57f3dd72f5214c1c3940439fae7fe"
+                "reference": "46023de9a91eec7dfb06cc56cb4e260017298517"
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             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/08c513bfcab57f3dd72f5214c1c3940439fae7fe",
-                "reference": "08c513bfcab57f3dd72f5214c1c3940439fae7fe",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/46023de9a91eec7dfb06cc56cb4e260017298517",
+                "reference": "46023de9a91eec7dfb06cc56cb4e260017298517",
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             },
             "require": {
@@ -1957,22 +1911,19 @@
                 "ext-pcre": "*",
                 "ext-reflection": "*",
                 "ext-spl": "*",
-                "myclabs/deep-copy": "~1.3",
-                "php": "^5.6 || ^7.0",
+                "php": ">=5.3.3",
                 "phpspec/prophecy": "^1.3.1",
-                "phpunit/php-code-coverage": ">=3.3.0,<4.0.0",
+                "phpunit/php-code-coverage": "~2.1",
                 "phpunit/php-file-iterator": "~1.4",
                 "phpunit/php-text-template": "~1.2",
                 "phpunit/php-timer": "^1.0.6",
-                "phpunit/phpunit-mock-objects": ">=3.1.0,<3.2.0",
-                "sebastian/comparator": "~1.1",
+                "phpunit/phpunit-mock-objects": "~2.3",
+                "sebastian/comparator": "~1.2.2",
                 "sebastian/diff": "~1.2",
                 "sebastian/environment": "~1.3",
                 "sebastian/exporter": "~1.2",
                 "sebastian/global-state": "~1.0",
-                "sebastian/object-enumerator": "~1.0",
-                "sebastian/resource-operations": "~1.0",
-                "sebastian/version": "~1.0|~2.0",
+                "sebastian/version": "~1.0",
                 "symfony/yaml": "~2.1|~3.0"
             },
             "suggest": {
@@ -1984,7 +1935,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "5.3.x-dev"
+                    "dev-master": "4.8.x-dev"
                 }
             },
             "autoload": {
@@ -2010,30 +1961,30 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2016-06-03T09:42:56+00:00"
+            "time": "2017-06-21T08:07:12+00:00"
         },
         {
             "name": "phpunit/phpunit-mock-objects",
-            "version": "3.1.3",
+            "version": "2.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit-mock-objects.git",
-                "reference": "151c96874bff6fe61a25039df60e776613a61489"
+                "reference": "ac8e7a3db35738d56ee9a76e78a4e03d97628983"
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             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit-mock-objects/zipball/151c96874bff6fe61a25039df60e776613a61489",
-                "reference": "151c96874bff6fe61a25039df60e776613a61489",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit-mock-objects/zipball/ac8e7a3db35738d56ee9a76e78a4e03d97628983",
+                "reference": "ac8e7a3db35738d56ee9a76e78a4e03d97628983",
                 "shasum": ""
             },
             "require": {
                 "doctrine/instantiator": "^1.0.2",
-                "php": ">=5.6",
+                "php": ">=5.3.3",
                 "phpunit/php-text-template": "~1.2",
                 "sebastian/exporter": "~1.2"
             },
             "require-dev": {
-                "phpunit/phpunit": "~5"
+                "phpunit/phpunit": "~4.4"
             },
             "suggest": {
                 "ext-soap": "*"
@@ -2041,7 +1992,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.1.x-dev"
+                    "dev-master": "2.3.x-dev"
                 }
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             "autoload": {
@@ -2066,7 +2017,7 @@
                 "mock",
                 "xunit"
             ],
-            "time": "2016-04-20T14:39:26+00:00"
+            "time": "2015-10-02T06:51:40+00:00"
         },
         {
             "name": "pimple/pimple",
@@ -2263,51 +2214,6 @@
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             "time": "2016-08-06T14:39:51+00:00"
         },
-        {
-            "name": "sebastian/code-unit-reverse-lookup",
-            "version": "1.0.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/sebastianbergmann/code-unit-reverse-lookup.git",
-                "reference": "4419fcdb5eabb9caa61a27c7a1db532a6b55dd18"
-            },
-            "dist": {
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-                "url": "https://api.github.com/repos/sebastianbergmann/code-unit-reverse-lookup/zipball/4419fcdb5eabb9caa61a27c7a1db532a6b55dd18",
-                "reference": "4419fcdb5eabb9caa61a27c7a1db532a6b55dd18",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^5.6 || ^7.0"
-            },
-            "require-dev": {
-                "phpunit/phpunit": "^5.7 || ^6.0"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.0.x-dev"
-                }
-            },
-            "autoload": {
-                "classmap": [
-                    "src/"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "BSD-3-Clause"
-            ],
-            "authors": [
-                {
-                    "name": "Sebastian Bergmann",
-                    "email": "sebastian@phpunit.de"
-                }
-            ],
-            "description": "Looks up which function or method a line of code belongs to",
-            "homepage": "https://github.com/sebastianbergmann/code-unit-reverse-lookup/",
-            "time": "2017-03-04T06:30:41+00:00"
-        },
         {
             "name": "sebastian/comparator",
             "version": "1.2.4",
@@ -2592,52 +2498,6 @@
             ],
             "time": "2015-10-12T03:26:01+00:00"
         },
-        {
-            "name": "sebastian/object-enumerator",
-            "version": "1.0.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/sebastianbergmann/object-enumerator.git",
-                "reference": "d4ca2fb70344987502567bc50081c03e6192fb26"
-            },
-            "dist": {
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                 "zendframework/zend-eventmanager": "^2.6.2 || ^3.0",
                 "zendframework/zend-filter": "^2.6.1",
@@ -3933,39 +3800,44 @@
                 "i18n",
                 "zf2"
             ],
-            "time": "2017-05-17T17:00:12+00:00"
+            "time": "2016-06-07T21:08:30+00:00"
         },
         {
             "name": "zendframework/zend-json",
-            "version": "3.1.0",
+            "version": "2.6.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/zendframework/zend-json.git",
-                "reference": "4dd940e8e6f32f1d36ea6b0677ea57c540c7c19c"
+                "reference": "4c8705dbe4ad7d7e51b2876c5b9eea0ef916ba28"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/zendframework/zend-json/zipball/4dd940e8e6f32f1d36ea6b0677ea57c540c7c19c",
-                "reference": "4dd940e8e6f32f1d36ea6b0677ea57c540c7c19c",
+                "url": "https://api.github.com/repos/zendframework/zend-json/zipball/4c8705dbe4ad7d7e51b2876c5b9eea0ef916ba28",
+                "reference": "4c8705dbe4ad7d7e51b2876c5b9eea0ef916ba28",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.6 || ^7.0"
+                "php": "^5.5 || ^7.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^5.7.23 || ^6.4.3",
-                "zendframework/zend-coding-standard": "~1.0.0",
-                "zendframework/zend-stdlib": "^2.7.7 || ^3.1"
+                "fabpot/php-cs-fixer": "1.7.*",
+                "phpunit/phpunit": "~4.0",
+                "zendframework/zend-http": "^2.5.4",
+                "zendframework/zend-server": "^2.6.1",
+                "zendframework/zend-stdlib": "^2.5 || ^3.0",
+                "zendframework/zendxml": "^1.0.2"
             },
             "suggest": {
-                "zendframework/zend-json-server": "For implementing JSON-RPC servers",
-                "zendframework/zend-xml2json": "For converting XML documents to JSON"
+                "zendframework/zend-http": "Zend\\Http component, required to use Zend\\Json\\Server",
+                "zendframework/zend-server": "Zend\\Server component, required to use Zend\\Json\\Server",
+                "zendframework/zend-stdlib": "Zend\\Stdlib component, for use with caching Zend\\Json\\Server responses",
+                "zendframework/zendxml": "To support Zend\\Json\\Json::fromXml() usage"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.1.x-dev",
-                    "dev-develop": "3.2.x-dev"
+                    "dev-master": "2.6-dev",
+                    "dev-develop": "2.7-dev"
                 }
             },
             "autoload": {
@@ -3978,48 +3850,47 @@
                 "BSD-3-Clause"
             ],
             "description": "provides convenience methods for serializing native PHP to JSON and decoding JSON to native PHP",
+            "homepage": "https://github.com/zendframework/zend-json",
             "keywords": [
-                "ZendFramework",
                 "json",
-                "zf"
+                "zf2"
             ],
-            "time": "2018-01-04T17:51:34+00:00"
+            "time": "2016-02-04T21:20:26+00:00"
         },
         {
             "name": "zendframework/zend-serializer",
-            "version": "2.8.1",
+            "version": "2.7.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/zendframework/zend-serializer.git",
-                "reference": "7ac42b9a47e9cb23895173a3096bc3b3fb7ac580"
+                "reference": "95385c2342fc335d5164eb95ac3ca230aa51223b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/zendframework/zend-serializer/zipball/7ac42b9a47e9cb23895173a3096bc3b3fb7ac580",
-                "reference": "7ac42b9a47e9cb23895173a3096bc3b3fb7ac580",
+                "url": "https://api.github.com/repos/zendframework/zend-serializer/zipball/95385c2342fc335d5164eb95ac3ca230aa51223b",
+                "reference": "95385c2342fc335d5164eb95ac3ca230aa51223b",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.6 || ^7.0",
-                "zendframework/zend-json": "^2.5 || ^3.0",
+                "php": "^5.5 || ^7.0",
+                "zendframework/zend-json": "^2.5",
                 "zendframework/zend-stdlib": "^2.7 || ^3.0"
             },
             "require-dev": {
-                "doctrine/instantiator": "1.0.*",
-                "phpunit/phpunit": "^5.5",
-                "zendframework/zend-coding-standard": "~1.0.0",
+                "fabpot/php-cs-fixer": "1.7.*",
+                "phpunit/phpunit": "^4.5",
                 "zendframework/zend-math": "^2.6",
                 "zendframework/zend-servicemanager": "^2.7.5 || ^3.0.3"
             },
             "suggest": {
-                "zendframework/zend-math": "(^2.6 || ^3.0) To support Python Pickle serialization",
-                "zendframework/zend-servicemanager": "(^2.7.5 || ^3.0.3) To support plugin manager support"
+                "zendframework/zend-math": "(^2.6) To support Python Pickle serialization",
+                "zendframework/zend-servicemanager": "To support plugin manager support"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.8-dev",
-                    "dev-develop": "2.9-dev"
+                    "dev-master": "2.7-dev",
+                    "dev-develop": "2.8-dev"
                 },
                 "zf": {
                     "component": "Zend\\Serializer",
@@ -4041,7 +3912,7 @@
                 "serializer",
                 "zf2"
             ],
-            "time": "2017-11-20T22:21:04+00:00"
+            "time": "2016-05-11T16:05:56+00:00"
         },
         {
             "name": "zendframework/zend-servicemanager",