diff --git a/Controller.php b/Controller.php
index 8a5acb4..fec1375 100644
--- a/Controller.php
+++ b/Controller.php
@@ -45,7 +45,7 @@ class Controller extends ModuleAbstract implements WebInterface
      * @var string
      * @since 1.0.0
      */
-    const MODULE_PATH = __DIR__;
+    /* public */ const MODULE_PATH = __DIR__;
 
     /**
      * Module version.
@@ -53,7 +53,7 @@ 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.
@@ -61,7 +61,7 @@ class Controller extends ModuleAbstract implements WebInterface
      * @var string
      * @since 1.0.0
      */
-    const MODULE_NAME = 'ProjectManagement';
+    /* public */ const MODULE_NAME = 'ProjectManagement';
 
     /**
      * Providing.
diff --git a/Models/ProjectResponsibility.php b/Models/ProjectResponsibility.php
index af2e041..f8be849 100644
--- a/Models/ProjectResponsibility.php
+++ b/Models/ProjectResponsibility.php
@@ -30,6 +30,6 @@ use phpOMS\Datatypes\Enum;
  */
 abstract class ProjectResponsibility extends Enum
 {
-    const MANAGER = 0;
-    const OTHER   = 1;
+    /* public */ const MANAGER = 0;
+    /* public */ const OTHER   = 1;
 }
diff --git a/Models/ProjectStatus.php b/Models/ProjectStatus.php
index 2c02a04..c8aa9a8 100644
--- a/Models/ProjectStatus.php
+++ b/Models/ProjectStatus.php
@@ -30,9 +30,9 @@ use phpOMS\Datatypes\Enum;
  */
 abstract class ProjectStatus extends Enum
 {
-    const ACTIVE   = 0;
-    const INACTIVE = 1;
-    const HOLD     = 2;
-    const CANCELED = 3;
-    const FINISHED = 4;
+    /* public */ const ACTIVE   = 0;
+    /* public */ const INACTIVE = 1;
+    /* public */ const HOLD     = 2;
+    /* public */ const CANCELED = 3;
+    /* public */ const FINISHED = 4;
 }