diff --git a/Admin/Install/Navigation.php b/Admin/Install/Navigation.php
index e5ac964..1017040 100644
--- a/Admin/Install/Navigation.php
+++ b/Admin/Install/Navigation.php
@@ -38,7 +38,7 @@ class Navigation
      */
     public static function install(string $path = null, DatabasePool $dbPool = null) : void
     {
-        $navData = json_decode(file_get_contents(__DIR__ . '/Navigation.install.json'), true);
+        $navData = \json_decode(file_get_contents(__DIR__ . '/Navigation.install.json'), true);
 
         $class = '\\Modules\\Navigation\\Admin\\Installer';
         /** @var $class \Modules\Navigation\Admin\Installer */
diff --git a/Models/QAAnswerMapper.php b/Models/QAAnswerMapper.php
index 5a78466..acb324a 100644
--- a/Models/QAAnswerMapper.php
+++ b/Models/QAAnswerMapper.php
@@ -33,7 +33,7 @@ class QAAnswerMapper extends DataMapperAbstract
     /**
      * Columns.
      *
-     * @var array
+     * @var array<string, array<string, string>>
      * @since 1.0.0
      */
     protected static $columns = [
diff --git a/Models/QABadgeMapper.php b/Models/QABadgeMapper.php
index 63c3ba2..b53a327 100644
--- a/Models/QABadgeMapper.php
+++ b/Models/QABadgeMapper.php
@@ -33,7 +33,7 @@ class QABadgeMapper extends DataMapperAbstract
     /**
      * Columns.
      *
-     * @var array
+     * @var array<string, array<string, string>>
      * @since 1.0.0
      */
     protected static $columns = [
diff --git a/Models/QACategoryMapper.php b/Models/QACategoryMapper.php
index aa9cd3c..e8fad1b 100644
--- a/Models/QACategoryMapper.php
+++ b/Models/QACategoryMapper.php
@@ -33,7 +33,7 @@ class QACategoryMapper extends DataMapperAbstract
     /**
      * Columns.
      *
-     * @var array
+     * @var array<string, array<string, string>>
      * @since 1.0.0
      */
     protected static $columns = [
diff --git a/Models/QAQuestionMapper.php b/Models/QAQuestionMapper.php
index b1b15a2..96945cf 100644
--- a/Models/QAQuestionMapper.php
+++ b/Models/QAQuestionMapper.php
@@ -33,7 +33,7 @@ class QAQuestionMapper extends DataMapperAbstract
     /**
      * Columns.
      *
-     * @var array
+     * @var array<string, array<string, string>>
      * @since 1.0.0
      */
     protected static $columns = [
@@ -50,7 +50,7 @@ class QAQuestionMapper extends DataMapperAbstract
     /**
      * Has many relation.
      *
-     * @var array
+     * @var array<string, array<string, string|null>>
      * @since 1.0.0
      */
     protected static $hasMany = [
@@ -71,7 +71,7 @@ class QAQuestionMapper extends DataMapperAbstract
     /**
      * Has many relation.
      *
-     * @var array
+     * @var array<string, array<string, string|null>>
      * @since 1.0.0
      */
     protected static $ownsOne = [