diff --git a/backend/lib/Model/Entity.php b/backend/lib/Model/Entity.php
index c868160..46084c7 100644
--- a/backend/lib/Model/Entity.php
+++ b/backend/lib/Model/Entity.php
@@ -49,7 +49,7 @@ use Volkszaehler\Util;
 abstract class Entity {
 	/**
 	 * @Id
-	 * @Column(type="smallint", nullable=false)
+	 * @Column(type="integer", nullable=false)
 	 * @GeneratedValue(strategy="AUTO")
 	 */
 	protected $id;
diff --git a/backend/lib/Model/Property.php b/backend/lib/Model/Property.php
index f9681fb..9c0391b 100644
--- a/backend/lib/Model/Property.php
+++ b/backend/lib/Model/Property.php
@@ -46,7 +46,7 @@ use Volkszaehler\Model;
 class Property {
 	/**
 	 * @Id
-	 * @Column(type="smallint", nullable=false)
+	 * @Column(type="integer", nullable=false)
 	 * @GeneratedValue(strategy="AUTO")
 	 *
 	 * @todo wait until DDC-117 is fixed (PKs on FKs)
diff --git a/backend/lib/Model/Token.php b/backend/lib/Model/Token.php
index ae8b560..2d443a5 100644
--- a/backend/lib/Model/Token.php
+++ b/backend/lib/Model/Token.php
@@ -38,7 +38,7 @@ use Volkszaehler\Util;
 class Token {
 	/**
 	 * @Id
-	 * @Column(type="smallint", nullable=false)
+	 * @Column(type="integer", nullable=false)
 	 * @GeneratedValue(strategy="AUTO")
 	 *
 	 * @todo wait until DDC-117 is fixed (PKs on FKs)