diff --git a/composer.json b/composer.json
index 6d239970d..9fca7d74c 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
     },
     "require": {
         "php": ">=5.3.2",
-        "justinrainbow/json-schema": "~1.1",
+        "justinrainbow/json-schema": "~1.3",
         "seld/jsonlint": "~1.0",
         "symfony/console": "~2.3",
         "symfony/finder": "~2.2",
diff --git a/composer.lock b/composer.lock
index 0c7ff85ba..7d28fcb09 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at http://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
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     ],
-    "hash": "0430383b5ba00e406ce4a44253f49fe7",
+    "hash": "2bc9cc8aa706b68d611d7058e4eb8de7",
     "packages": [
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             "name": "justinrainbow/json-schema",
@@ -327,16 +327,16 @@
         },
         {
             "name": "phpunit/php-code-coverage",
-            "version": "2.0.13",
+            "version": "2.0.14",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
-                "reference": "0e7d2eec5554f869fa7a4ec2d21e4b37af943ea5"
+                "reference": "ca158276c1200cc27f5409a5e338486bc0b4fc94"
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-                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/0e7d2eec5554f869fa7a4ec2d21e4b37af943ea5",
-                "reference": "0e7d2eec5554f869fa7a4ec2d21e4b37af943ea5",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/ca158276c1200cc27f5409a5e338486bc0b4fc94",
+                "reference": "ca158276c1200cc27f5409a5e338486bc0b4fc94",
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@@ -388,7 +388,7 @@
                 "testing",
                 "xunit"
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-            "time": "2014-12-03 06:41:44"
+            "time": "2014-12-26 13:28:33"
         },
         {
             "name": "phpunit/php-file-iterator",
@@ -574,16 +574,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "4.4.0",
+            "version": "4.4.1",
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                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "bbe7bcb83b6ec1a9eaabbe1b70d4795027c53ee0"
+                "reference": "6a5e49a86ce5e33b8d0657abe145057fc513543a"
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-                "reference": "bbe7bcb83b6ec1a9eaabbe1b70d4795027c53ee0",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/6a5e49a86ce5e33b8d0657abe145057fc513543a",
+                "reference": "6a5e49a86ce5e33b8d0657abe145057fc513543a",
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             "require": {
@@ -641,7 +641,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2014-12-05 06:49:03"
+            "time": "2014-12-28 07:57:05"
         },
         {
             "name": "phpunit/phpunit-mock-objects",
@@ -982,16 +982,16 @@
         },
         {
             "name": "sebastian/version",
-            "version": "1.0.3",
+            "version": "1.0.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/version.git",
-                "reference": "b6e1f0cf6b9e1ec409a0d3e2f2a5fb0998e36b43"
+                "reference": "a77d9123f8e809db3fbdea15038c27a95da4058b"
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             "dist": {
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-                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/b6e1f0cf6b9e1ec409a0d3e2f2a5fb0998e36b43",
-                "reference": "b6e1f0cf6b9e1ec409a0d3e2f2a5fb0998e36b43",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/a77d9123f8e809db3fbdea15038c27a95da4058b",
+                "reference": "a77d9123f8e809db3fbdea15038c27a95da4058b",
                 "shasum": ""
             },
             "type": "library",
@@ -1013,7 +1013,7 @@
             ],
             "description": "Library that helps with managing the version number of Git-hosted PHP projects",
             "homepage": "https://github.com/sebastianbergmann/version",
-            "time": "2014-03-07 15:35:33"
+            "time": "2014-12-15 14:25:24"
         },
         {
             "name": "symfony/yaml",
@@ -1067,6 +1067,7 @@
     "minimum-stability": "stable",
     "stability-flags": [],
     "prefer-stable": false,
+    "prefer-lowest": false,
     "platform": {
         "php": ">=5.3.2"
     },