diff --git a/Controller.php b/Controller.php
index 25918df..266e7cc 100644
--- a/Controller.php
+++ b/Controller.php
@@ -44,7 +44,7 @@ class Controller extends ModuleAbstract implements WebInterface
      * @var string
      * @since 1.0.0
      */
-    const MODULE_PATH = __DIR__;
+    /* public */ const MODULE_PATH = __DIR__;
 
     /**
      * Module version.
@@ -52,7 +52,7 @@ class Controller extends ModuleAbstract implements WebInterface
      * @var string
      * @since 1.0.0
      */
-    const MODULE_VERSION = '1.0.0';
+    /* public */ const MODULE_VERSION = '1.0.0';
 
     /**
      * Module name.
@@ -60,7 +60,7 @@ class Controller extends ModuleAbstract implements WebInterface
      * @var string
      * @since 1.0.0
      */
-    const MODULE_NAME = 'Navigation';
+    /* public */ const MODULE_NAME = 'Navigation';
 
     /**
      * Providing.
diff --git a/Models/LinkType.php b/Models/LinkType.php
index 510f145..b6c084b 100644
--- a/Models/LinkType.php
+++ b/Models/LinkType.php
@@ -30,7 +30,7 @@ use phpOMS\Datatypes\Enum;
  */
 abstract class LinkType extends Enum
 {
-    const CATEGORY = 0;
+    /* public */ const CATEGORY = 0;
 
-    const LINK = 1;
+    /* public */ const LINK = 1;
 }
diff --git a/Models/NavigationType.php b/Models/NavigationType.php
index b55bed5..adc337f 100644
--- a/Models/NavigationType.php
+++ b/Models/NavigationType.php
@@ -30,15 +30,15 @@ use phpOMS\Datatypes\Enum;
  */
 abstract class NavigationType extends Enum
 {
-    const TOP = 1;
+    /* public */ const TOP = 1;
 
-    const SIDE = 2;
+    /* public */ const SIDE = 2;
 
-    const CONTENT = 3;
+    /* public */ const CONTENT = 3;
 
-    const TAB = 4;
+    /* public */ const TAB = 4;
 
-    const CONTENT_SIDE = 5;
+    /* public */ const CONTENT_SIDE = 5;
 
-    const BOTTOM = 6;
+    /* public */ const BOTTOM = 6;
 }