diff --git a/Event/EventManager.php b/Event/EventManager.php
index 898b3821c..ecdd60481 100644
--- a/Event/EventManager.php
+++ b/Event/EventManager.php
@@ -157,19 +157,25 @@ class EventManager
      *
      * @param string $group Name of the event
      *
-     * @return void
+     * @return bool
      *
      * @since  1.0.0
      */
-    public function detach(string $group) /* : bool */
+    public function detach(string $group) : bool
     {
+        $found = false;
+
         if (isset($this->callbacks[$group])) {
             unset($this->callbacks[$group]);
+            $found = true;
         }
 
         if (isset($this->groups[$group])) {
             unset($this->groups[$group]);
+            $found = true;
         }
+
+        return $found;
     }
 
     /**
diff --git a/Localization/L11nManager.php b/Localization/L11nManager.php
index 100646fbb..91590e1a1 100644
--- a/Localization/L11nManager.php
+++ b/Localization/L11nManager.php
@@ -189,4 +189,9 @@ class L11nManager
 
         return $this->language[$code][$module][$translation];
     }
+
+    public function getHtml(string $code, string $module, string $theme, string $translation) : string
+    {
+        return htmlspecialchars($this->getText($code, $module, $theme, $translation));
+    }
 }
diff --git a/Message/Http/Request.php b/Message/Http/Request.php
index 084de7896..60badbd4d 100644
--- a/Message/Http/Request.php
+++ b/Message/Http/Request.php
@@ -282,6 +282,7 @@ class Request extends RequestAbstract
         if (!isset($this->browser)) {
             $arr               = BrowserType::getConstants();
             $http_request_type = strtolower($_SERVER['HTTP_USER_AGENT']);
+            
             foreach ($arr as $key => $val) {
                 if (stripos($http_request_type, $val)) {
                     $this->browser = $val;
diff --git a/Message/RequestAbstract.php b/Message/RequestAbstract.php
index 70c078137..b3cc27a4b 100644
--- a/Message/RequestAbstract.php
+++ b/Message/RequestAbstract.php
@@ -110,7 +110,7 @@ abstract class RequestAbstract implements MessageInterface
      * @var \phpOMS\Message\RequestSource
      * @since 1.0.0
      */
-    private $source = null;
+    private $source = RequestSource::UNDEFINED;
 
     /**
      * Request hash.
diff --git a/Message/RequestSource.php b/Message/RequestSource.php
index a65e90d5a..3b30da6df 100644
--- a/Message/RequestSource.php
+++ b/Message/RequestSource.php
@@ -31,4 +31,5 @@ abstract class RequestSource extends Enum
     /* public */ const WEB = 0; /* This is a http request */
     /* public */ const CONSOLE = 1; /* Request is a console command */
     /* public */ const SOCKET = 2; /* Request through socket connection */
+    /* public */ const UNDEFINED = 3; /* Request through socket connection */
 }
diff --git a/Validation/Base/DateTime.php b/Validation/Base/DateTime.php
index e7a5ba372..8f0e8cdb8 100644
--- a/Validation/Base/DateTime.php
+++ b/Validation/Base/DateTime.php
@@ -41,7 +41,7 @@ abstract class DateTime extends ValidatorAbstract
     /**
      * {@inheritdoc}
      */
-    public static function isValid($value) : bool
+    public static function isValid($value, array $constraints = null) : bool
     {
         return (bool) strtotime($value);
     }
diff --git a/Validation/Finance/BIC.php b/Validation/Finance/BIC.php
index cdf5e91db..5802fa04c 100644
--- a/Validation/Finance/BIC.php
+++ b/Validation/Finance/BIC.php
@@ -41,7 +41,7 @@ class BIC extends ValidatorAbstract
     /**
      * {@inheritdoc}
      */
-    public static function isValid($value) : bool
+    public static function isValid($value, array $constraints = null) : bool
     {
         return (bool) preg_match('/^[a-z]{6}[0-9a-z]{2}([0-9a-z]{3})?\z/i', $value);
     }
diff --git a/Validation/Finance/CreditCard.php b/Validation/Finance/CreditCard.php
index 899129672..4ed2c178f 100644
--- a/Validation/Finance/CreditCard.php
+++ b/Validation/Finance/CreditCard.php
@@ -41,7 +41,7 @@ abstract class CreditCard extends ValidatorAbstract
     /**
      * {@inheritdoc}
      */
-    public static function isValid($value) : bool
+    public static function isValid($value, array $constraints = null) : bool
     {
         $value = preg_replace('/\D/', '', $value);
 
diff --git a/Validation/Finance/Iban.php b/Validation/Finance/Iban.php
index 3045603b3..9095b3b87 100644
--- a/Validation/Finance/Iban.php
+++ b/Validation/Finance/Iban.php
@@ -45,7 +45,7 @@ abstract class Iban extends ValidatorAbstract
      *
      * @since  1.0.0
      */
-    public static function isValid($value) : bool
+    public static function isValid($value, array $constraints = null) : bool
     {
         $value    = str_replace(' ', '', strtolower($value));
         $enumName = 'C_' . strtoupper(substr($value, 0, 2));
diff --git a/Validation/Network/Email.php b/Validation/Network/Email.php
index 8f3e506ed..f474ac3e0 100644
--- a/Validation/Network/Email.php
+++ b/Validation/Network/Email.php
@@ -41,7 +41,7 @@ class Email extends ValidatorAbstract
     /**
      * {@inheritdoc}
      */
-    public static function isValid(string $value) : bool
+    public static function isValid($value, array $constraints = null) : bool
     {
         if (filter_var($value, FILTER_VALIDATE_EMAIL) === false) {
             self::$msg   = 'Invalid Email by filter_var standards';
diff --git a/Validation/Network/Hostname.php b/Validation/Network/Hostname.php
index 53df28894..5d64b4c3b 100644
--- a/Validation/Network/Hostname.php
+++ b/Validation/Network/Hostname.php
@@ -41,7 +41,7 @@ abstract class Hostname extends ValidatorAbstract
     /**
      * {@inheritdoc}
      */
-    public static function isValid($value) : bool
+    public static function isValid($value, array $constraints = null) : bool
     {
         return filter_var(gethostbyname($value), FILTER_VALIDATE_IP) !== false;
     }
diff --git a/Validation/Network/Ip.php b/Validation/Network/Ip.php
index abd1222e5..4a1788b9a 100644
--- a/Validation/Network/Ip.php
+++ b/Validation/Network/Ip.php
@@ -41,7 +41,7 @@ class Ip extends ValidatorAbstract
     /**
      * {@inheritdoc}
      */
-    public static function isValid($value) : bool
+    public static function isValid($value, array $constraints = null) : bool
     {
         return filter_var($value, FILTER_VALIDATE_IP) !== false;
     }