diff --git a/src/Parameter/Format/BooleanCheck.php b/src/Parameter/Format/BooleanCheck.php
index dc44025..da8590e 100644
--- a/src/Parameter/Format/BooleanCheck.php
+++ b/src/Parameter/Format/BooleanCheck.php
@@ -12,7 +12,7 @@ class BooleanCheck
      */
     public function check(array $param)
     {
-        if (!is_bool($param['value'])) {
+        if ($param['value'] !== 'true' && $param['value'] !== 'false') {
             throw new ValidationException('Value is not a boolean');
         }
     }
diff --git a/src/Parameter/Format/IntegerCheck.php b/src/Parameter/Format/IntegerCheck.php
index bb212b2..ff8263d 100644
--- a/src/Parameter/Format/IntegerCheck.php
+++ b/src/Parameter/Format/IntegerCheck.php
@@ -12,7 +12,7 @@ class IntegerCheck
      */
     public function check(array $param)
     {
-        if (!is_int($param['value'])) {
+        if (!filter_var($param['value'], FILTER_VALIDATE_INT)) {
             throw new ValidationException('Value is not an integer');
         }
         if (!isset($param['format'])) {
diff --git a/src/Parameter/Format/NumberCheck.php b/src/Parameter/Format/NumberCheck.php
index 030e998..7a2cc41 100644
--- a/src/Parameter/Format/NumberCheck.php
+++ b/src/Parameter/Format/NumberCheck.php
@@ -12,7 +12,7 @@ class NumberCheck
      */
     public function check(array $param)
     {
-        if (!is_int($param['value']) && !is_float($param['value'])) {
+        if (!filter_var($param['value'], FILTER_VALIDATE_FLOAT)) {
             throw new ValidationException('Value is not a number');
         }
 
diff --git a/tests/unit/src/Parameter/Format/BooleanCheckTest.php b/tests/unit/src/Parameter/Format/BooleanCheckTest.php
index 1ad5cca..d953fee 100644
--- a/tests/unit/src/Parameter/Format/BooleanCheckTest.php
+++ b/tests/unit/src/Parameter/Format/BooleanCheckTest.php
@@ -24,7 +24,7 @@ public function testCheckThrowsExceptionIfNotABoolean()
     public function testCheckContinuesNormallyIfOkay()
     {
         $mockParam = [
-            'value' => false,
+            'value' => 'false',
         ];
 
         $booleanCheck = new BooleanCheck;
diff --git a/tests/unit/src/Parameter/Format/IntegerCheckTest.php b/tests/unit/src/Parameter/Format/IntegerCheckTest.php
index eb4eb76..701b810 100644
--- a/tests/unit/src/Parameter/Format/IntegerCheckTest.php
+++ b/tests/unit/src/Parameter/Format/IntegerCheckTest.php
@@ -24,7 +24,7 @@ public function testCheckThrowsExceptionIfNotAnInteger()
     public function testCheckIgnoresFormatIfNotDefined()
     {
         $mockParam = [
-            'value' => 2147483647 + 1,
+            'value' => (string) 2147483647 + 1,
         ];
 
         $integerCheck = new IntegerCheck;
@@ -38,7 +38,7 @@ public function testCheckIgnoresFormatIfNotDefined()
     public function testCheckThrowsExceptionIfExceedsInt32Bounds()
     {
         $mockParam = [
-            'value' => 2147483647 + 1,
+            'value' => (string) 2147483647 + 1,
             'format' => 'int32',
         ];
 
@@ -49,7 +49,7 @@ public function testCheckThrowsExceptionIfExceedsInt32Bounds()
     public function testCheckPassesIfWithinInt32Bounds()
     {
         $mockParam = [
-            'value' => -2147483647 + 1,
+            'value' => (string) -2147483647 + 1,
             'format' => 'int32',
         ];
 
@@ -64,7 +64,7 @@ public function testCheckPassesIfWithinInt32Bounds()
     public function testCheckThrowsExceptionIfExceedsInt64Bounds()
     {
        $mockParam = [
-           'value' => -9223372036854775807 - 1,
+           'value' => (string) -9223372036854775807 - 1,
            'format' => 'int64',
        ];
 
@@ -75,7 +75,7 @@ public function testCheckThrowsExceptionIfExceedsInt64Bounds()
     public function testCheckPassesIfWithinInt64Bounds()
     {
         $mockParam = [
-            'value' => 9223372036854775807 - 1,
+            'value' => (string) 9223372036854775807 - 1,
         ];
 
         $integerCheck = new IntegerCheck;
diff --git a/tests/unit/src/Parameter/Format/NumberCheckTest.php b/tests/unit/src/Parameter/Format/NumberCheckTest.php
index 219d375..88fa420 100644
--- a/tests/unit/src/Parameter/Format/NumberCheckTest.php
+++ b/tests/unit/src/Parameter/Format/NumberCheckTest.php
@@ -28,7 +28,7 @@ public function testCheckThrowsExceptionIfNotANumber()
     public function testCheckCallsToRangeCheckIfOkay()
     {
         $mockParam = [
-            'value' => 512.123,
+            'value' => (string) 512.123,
         ];
 
         $numberCheck = $this->getMockBuilder(NumberCheck::class)
@@ -51,7 +51,7 @@ public function testCheckRangeFailsIfValueIsExceedsMaximum()
         $mockParam = [
             'maximum' => 5,
             'minimum' => 2,
-            'value' => 6,
+            'value' => (string) 6,
         ];
 
         $reflectedNumberCheck = new ReflectionClass(NumberCheck::class);
@@ -72,7 +72,7 @@ public function testCheckRangeFailsIfValueIsExceedsExclusiveMaximum()
     {
         $mockParam = [
             'exclusiveMaximum' => 5,
-            'value' => 5,
+            'value' => (string) 5,
         ];
 
         $reflectedNumberCheck = new ReflectionClass(NumberCheck::class);
@@ -94,7 +94,7 @@ public function testCheckRangeFailsIfValueIsExceedsMinimum()
         $mockParam = [
             'minimum' => 5,
             'minimum' => 2,
-            'value' => 1,
+            'value' => (string) 1,
         ];
 
         $reflectedNumberCheck = new ReflectionClass(NumberCheck::class);
@@ -115,7 +115,7 @@ public function testCheckRangeFailsIfValueIsExceedsExclusiveMinimum()
     {
         $mockParam = [
             'exclusiveMinimum' => 2,
-            'value' => 2,
+            'value' => (string) 2,
         ];
 
         $reflectedNumberCheck = new ReflectionClass(NumberCheck::class);
@@ -133,7 +133,7 @@ public function testCheckRangePassesIfWithinRange()
         $mockParam = [
             'maximum' => 5,
             'minimum' => 2,
-            'value' => 4,
+            'value' => (string) 4,
         ];
 
         $reflectedNumberCheck = new ReflectionClass(NumberCheck::class);