diff --git a/src/Pecee/Http/Input/InputHandler.php b/src/Pecee/Http/Input/InputHandler.php
index e485505..c6a000d 100644
--- a/src/Pecee/Http/Input/InputHandler.php
+++ b/src/Pecee/Http/Input/InputHandler.php
@@ -319,7 +319,7 @@ class InputHandler
     public function all(array $filter = []): array
     {
         $output = $this->originalParams + $this->originalPost + $this->originalFile;
-        $output = (\count($filter) > 0) ? array_intersect_key($output, array_flip($filter)) : $output;
+        $output = (\count($filter) > 0) ? \array_intersect_key($output, \array_flip($filter)) : $output;
 
         foreach ($filter as $filterKey) {
             if (array_key_exists($filterKey, $output) === false) {
diff --git a/src/Pecee/SimpleRouter/SimpleRouter.php b/src/Pecee/SimpleRouter/SimpleRouter.php
index 284078b..5d87c4c 100644
--- a/src/Pecee/SimpleRouter/SimpleRouter.php
+++ b/src/Pecee/SimpleRouter/SimpleRouter.php
@@ -59,6 +59,11 @@ class SimpleRouter
      */
     public static function start(): void
     {
+        // Set default namespaces
+        foreach (static::router()->getRoutes() as $route) {
+            static::addDefaultNamespace($route);
+        }
+
         echo static::router()->start();
     }
 
@@ -307,8 +312,8 @@ class SimpleRouter
      * @param string $url
      * @param string|array|\Closure $callback
      * @param array|null $settings
-     * @see SimpleRouter::form
      * @return RouteUrl
+     * @see SimpleRouter::form
      */
     public static function basic(string $url, $callback, array $settings = null): IRoute
     {
@@ -322,14 +327,14 @@ class SimpleRouter
      * @param string $url
      * @param string|array|\Closure $callback
      * @param array|null $settings
-     * @see SimpleRouter::form
      * @return RouteUrl
+     * @see SimpleRouter::form
      */
     public static function form(string $url, $callback, array $settings = null): IRoute
     {
         return static::match([
             Request::REQUEST_TYPE_GET,
-            Request::REQUEST_TYPE_POST
+            Request::REQUEST_TYPE_POST,
         ], $url, $callback, $settings);
     }
 
@@ -346,7 +351,6 @@ class SimpleRouter
     {
         $route = new RouteUrl($url, $callback);
         $route->setRequestMethods($requestMethods);
-        $route = static::addDefaultNamespace($route);
 
         if ($settings !== null) {
             $route->setSettings($settings);
@@ -366,7 +370,6 @@ class SimpleRouter
     public static function all(string $url, $callback, array $settings = null)
     {
         $route = new RouteUrl($url, $callback);
-        $route = static::addDefaultNamespace($route);
 
         if ($settings !== null) {
             $route->setSettings($settings);
@@ -386,7 +389,6 @@ class SimpleRouter
     public static function controller(string $url, string $controller, array $settings = null)
     {
         $route = new RouteController($url, $controller);
-        $route = static::addDefaultNamespace($route);
 
         if ($settings !== null) {
             $route->setSettings($settings);
@@ -406,7 +408,6 @@ class SimpleRouter
     public static function resource(string $url, string $controller, array $settings = null)
     {
         $route = new RouteResource($url, $controller);
-        $route = static::addDefaultNamespace($route);
 
         if ($settings !== null) {
             $route->setSettings($settings);
@@ -511,22 +512,19 @@ class SimpleRouter
     {
         if (static::$defaultNamespace !== null) {
 
-            $callback = $route->getCallback();
+            $ns = static::$defaultNamespace;
+            $namespace = $route->getNamespace();
 
-            /* Only add default namespace on relative callbacks */
-            if ($callback === null || (\is_string($callback) === true && $callback[0] !== '\\')) {
-
-                $namespace = static::$defaultNamespace;
-
-                $currentNamespace = $route->getNamespace();
-
-                if ($currentNamespace !== null) {
-                    $namespace .= '\\' . $currentNamespace;
+            if ($namespace !== null) {
+                // Don't overwrite namespaces that starts with \
+                if ($namespace[0] !== '\\') {
+                    $ns .= '\\' . $namespace;
+                } else {
+                    $ns = $namespace;
                 }
-
-                $route->setDefaultNamespace($namespace);
-
             }
+
+            $route->setNamespace($ns);
         }
 
         return $route;
diff --git a/tests/Pecee/SimpleRouter/RouterUrlTest.php b/tests/Pecee/SimpleRouter/RouterUrlTest.php
index 2aa4706..2d67e49 100644
--- a/tests/Pecee/SimpleRouter/RouterUrlTest.php
+++ b/tests/Pecee/SimpleRouter/RouterUrlTest.php
@@ -183,4 +183,26 @@ class RouterUrlTest extends \PHPUnit\Framework\TestCase
         $this->assertEquals('match', $output);
     }
 
+    public function testDefaultNamespace()
+    {
+        TestRouter::setDefaultNamespace('\\TestRoutersss');
+
+        TestRouter::get('/', 'DummyController@method1', ['as' => 'home']);
+        TestRouter::get('/about', 'DummyController@about');
+
+        TestRouter::group([
+            'prefix' => '/horses',
+        ], function() {
+
+            TestRouter::get('/about', 'DummyController@about');
+
+        });
+
+
+        TestRouter::debugNoReset('/horses/about');
+
+
+        $routes = TestRouter::router()->getRoutes();
+    }
+
 }
\ No newline at end of file