diff --git a/src/Parameter.php b/src/Parameter.php
index 4dcd079..b56e9d0 100644
--- a/src/Parameter.php
+++ b/src/Parameter.php
@@ -258,7 +258,7 @@ public function assertValue($value)
     {
         // required?
         if (empty($value)) {
-            if ($this->getRequired()) {
+            if ($this->getRequired() && !$this->isBooleanWithValueFalse($value)) {
                 $this->throwInvalidParameter($this->getName().' is required');
             }
             //no need to continue, the value is empty & not required
@@ -361,4 +361,12 @@ protected function throwInvalidParameter($message)
             new Error($message, 'parameter-invalid'),
         ]);
     }
+
+    /**
+     * @param mixed $value
+     */
+    private function isBooleanWithValueFalse($value): bool
+    {
+        return $this->getType() === self::TYPE_BOOLEAN && is_bool($value) && $value === false;
+    }
 }