diff --git a/src/spec/Schema.php b/src/spec/Schema.php
index 2145d23..998188f 100644
--- a/src/spec/Schema.php
+++ b/src/spec/Schema.php
@@ -128,8 +128,8 @@ protected function attributeDefaults(): array
             // return null as default when there is no type
             // return false as default when there is a type
             'nullable' => $this->hasPropertyValue('type') ? false : null,
-            'exclusiveMinimum' => $this->hasPropertyValue('minimum') ? false : null,
-            'exclusiveMaximum' => $this->hasPropertyValue('maximum') ? false : null,
+            'exclusiveMinimum' => null,
+            'exclusiveMaximum' => null,
         ];
     }
 
diff --git a/tests/spec/SchemaTest.php b/tests/spec/SchemaTest.php
index 2701694..be4cd6b 100644
--- a/tests/spec/SchemaTest.php
+++ b/tests/spec/SchemaTest.php
@@ -78,7 +78,7 @@ public function testMinMax()
         /** @var $schema Schema */
         $schema = Reader::readFromJson('{"type": "integer", "minimum": 1}', Schema::class);
         $this->assertEquals(1, $schema->minimum);
-        $this->assertFalse($schema->exclusiveMinimum);
+        $this->assertNull($schema->exclusiveMinimum);
         $this->assertNull($schema->maximum);
         $this->assertNull($schema->exclusiveMaximum);
 
@@ -92,7 +92,7 @@ public function testMinMax()
         /** @var $schema Schema */
         $schema = Reader::readFromJson('{"type": "integer", "maximum": 10}', Schema::class);
         $this->assertEquals(10, $schema->maximum);
-        $this->assertFalse($schema->exclusiveMaximum);
+        $this->assertNull($schema->exclusiveMaximum);
         $this->assertNull($schema->minimum);
         $this->assertNull($schema->exclusiveMinimum);