diff --git a/Classes/Domain/Model/Tag.php b/Classes/Domain/Model/Tag.php
index 142624212b8d0835a61cf4efebd226e151750d0b..1dbb808c4adb7dd2a20923b31876db220f4edea3 100644
--- a/Classes/Domain/Model/Tag.php
+++ b/Classes/Domain/Model/Tag.php
@@ -37,6 +37,11 @@ class Tag extends AbstractEntity {
 	 */
 	protected $title = '';
 
+	/**
+	 * @var int
+	 */
+	protected $parent;
+
 	/**
 	 * @return string
 	 */
@@ -51,4 +56,18 @@ class Tag extends AbstractEntity {
 	public function setTitle($title) {
 		$this->title = $title;
 	}
+
+	/**
+	 * @return int
+	 */
+	public function getParent() {
+		return $this->parent;
+	}
+
+	/**
+	 * @param int $parent
+	 */
+	public function setParent($parent) {
+		$this->parent = $parent;
+	}
 }
diff --git a/composer.json b/composer.json
index eca29e84c9c0dc1b44fe49b808dc9dbee55e6fe1..72d7d08bcb47ef7d86fae818329277a2351f20be 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
 	"license": [
 		"GPL-2.0+"
 	],
-	"version": "5.0.3",
+	"version": "5.1.0",
 	"support": {
 	},
 	"repositories": [
diff --git a/ext_emconf.php b/ext_emconf.php
index 1e2702a4ba98ca86572afd20103d4661858e3c16..58b99d094dc71fdebc268bd60f94606ed7086743 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -19,7 +19,7 @@ $EM_CONF[$_EXTKEY] = [
 	'modify_tables' => '',
 	'clearCacheOnLoad' => 0,
 	'lockType' => '',
-	'version' => '5.0.3',
+	'version' => '5.1.0',
 	'constraints' => [
 		'depends' => [
 			'typo3' => '7.6.0-8.7.99',