diff --git a/composer.json b/composer.json
index c6b6936c..df1b806c 100644
--- a/composer.json
+++ b/composer.json
@@ -28,12 +28,13 @@
     ],
     "require": {
         "php": ">=5.3.3",
+        "ext-json": "*",
         "marc-mabe/php-enum":"^2.0 || ^3.0 || ^4.0",
         "icecave/parity": "1.0.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "~2.2.20 || ~2.19.0",
-        "json-schema/json-schema-test-suite": "1.2.0",
+        "json-schema/json-schema-test-suite": "2.0.0",
         "phpunit/phpunit": "^4.8.35"
     },
     "extra": {
@@ -56,11 +57,11 @@
             "type": "package",
             "package": {
                 "name": "json-schema/json-schema-test-suite",
-                "version": "1.2.0",
+                "version": "2.0.0",
                 "source": {
                     "type": "git",
                     "url": "https://github.com/json-schema/JSON-Schema-Test-Suite",
-                    "reference": "1.2.0"
+                    "reference": "2.0.0"
                 }
             }
         }
diff --git a/src/JsonSchema/Constraints/ObjectConstraint.php b/src/JsonSchema/Constraints/ObjectConstraint.php
index b4f85650..bd77c7ac 100644
--- a/src/JsonSchema/Constraints/ObjectConstraint.php
+++ b/src/JsonSchema/Constraints/ObjectConstraint.php
@@ -173,6 +173,11 @@ protected function &getProperty(&$element, $property, $fallback = null)
      */
     protected function validateMinMaxConstraint($element, $objectDefinition, JsonPointer $path = null)
     {
+        // minProperties and maxProperties constraints only applies on objects elements.
+        if (!is_object($element)) {
+            return;
+        }
+
         // Verify minimum number of properties
         if (isset($objectDefinition->minProperties) && !is_object($objectDefinition->minProperties)) {
             if ($this->getTypeCheck()->propertyCount($element) < $objectDefinition->minProperties) {
diff --git a/tests/Constraints/MinMaxPropertiesTest.php b/tests/Constraints/MinMaxPropertiesTest.php
index 90774b91..8ce2647c 100644
--- a/tests/Constraints/MinMaxPropertiesTest.php
+++ b/tests/Constraints/MinMaxPropertiesTest.php
@@ -63,6 +63,39 @@ public function getValidTests()
                   }
                 }'
             ),
+            // Ignore array.
+            array(
+                '{
+                  "value": []
+                }',
+                '{
+                  "properties": {
+                    "value": {"minProperties": 1,"maxProperties": 2}
+                  }
+                }'
+            ),
+            // Ignore string.
+            array(
+                '{
+                  "value": "foo"
+                }',
+                '{
+                  "properties": {
+                    "value": {"minProperties": 1,"maxProperties": 2}
+                  }
+                }'
+            ),
+            // Ignore anything that is non-object.
+            array(
+                '{
+                  "value": 42
+                }',
+                '{
+                  "properties": {
+                    "value": {"minProperties": 1,"maxProperties": 2}
+                  }
+                }'
+            ),
         );
     }
 
@@ -123,16 +156,14 @@ public function getInvalidTests()
                   }
                 }'
             ),
-            array(
-                '{
-                  "value": []
-                }',
-                '{
-                  "properties": {
-                    "value": {"minProperties": 1,"maxProperties": 2}
-                  }
-                }'
-            ),
         );
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getInvalidForAssocTests()
+    {
+        return array();
+    }
 }
diff --git a/tests/Drafts/Draft4Test.php b/tests/Drafts/Draft4Test.php
index 54eee4c4..73d1d5a9 100644
--- a/tests/Drafts/Draft4Test.php
+++ b/tests/Drafts/Draft4Test.php
@@ -33,7 +33,10 @@ public function getInvalidForAssocTests()
         $tests = parent::getInvalidForAssocTests();
         unset(
             $tests['type.json / object type matches objects / an array is not an object'],
-            $tests['type.json / array type matches arrays / an object is not an array']
+            $tests['type.json / array type matches arrays / an object is not an array'],
+            // Arrays must be ignored and in assoc case, these data are arrays and not objects.
+            $tests['maxProperties.json / maxProperties validation / too long is invalid'],
+            $tests['minProperties.json / minProperties validation / too short is invalid']
         );
 
         return $tests;
@@ -44,7 +47,9 @@ public function getValidForAssocTests()
         $tests = parent::getValidForAssocTests();
         unset(
             $tests['type.json / object type matches objects / an array is not an object'],
-            $tests['type.json / array type matches arrays / an object is not an array']
+            $tests['type.json / array type matches arrays / an object is not an array'],
+            // Arrays must be ignored and in assoc case, these data are arrays and not objects.
+            $tests['required.json / required validation / ignores arrays']
         );
 
         return $tests;
@@ -58,10 +63,12 @@ protected function getSkippedTests()
         return array(
             // Optional
             'bignum.json',
+            'ecmascript-regex.json',
             'format.json',
             'zeroTerminatedFloats.json',
             // Required
-            'not.json' // only one test case failing
+            'not.json', // only one test case failing
+            'ref.json', // external references can not be found (localhost:1234)
         );
     }
 }