diff --git a/README.md b/README.md
index bf18d32..f0747c6 100644
--- a/README.md
+++ b/README.md
@@ -109,6 +109,7 @@ V::lang('ar');
  * `accepted` - Checkbox or Radio must be accepted (yes, on, 1, true)
  * `numeric` - Must be numeric
  * `integer` - Must be integer number
+ * `boolean` - Must be boolean
  * `array` - Must be array
  * `length` - String must be certain length
  * `lengthBetween` - String must be between given lengths
diff --git a/src/Valitron/Validator.php b/src/Valitron/Validator.php
index 4c3b10d..dbf2086 100644
--- a/src/Valitron/Validator.php
+++ b/src/Valitron/Validator.php
@@ -653,7 +653,7 @@ class Validator
      */
     protected function validateBoolean($field, $value)
     {
-        return (is_bool($value)) ? true : false;
+        return is_bool($value);
     }
 
     /**