diff --git a/apps/dav/appinfo/info.xml b/apps/dav/appinfo/info.xml
index 61e7444afc..b104cb7fd6 100644
--- a/apps/dav/appinfo/info.xml
+++ b/apps/dav/appinfo/info.xml
@@ -5,7 +5,7 @@
 	<description>WebDAV endpoint</description>
 	<licence>AGPL</licence>
 	<author>owncloud.org</author>
-	<version>1.4.2</version>
+	<version>1.4.3</version>
 	<default_enable/>
 	<types>
 		<filesystem/>
diff --git a/apps/dav/lib/Migration/Version1004Date20170924124212.php b/apps/dav/lib/Migration/Version1004Date20170924124212.php
new file mode 100644
index 0000000000..425747af74
--- /dev/null
+++ b/apps/dav/lib/Migration/Version1004Date20170924124212.php
@@ -0,0 +1,50 @@
+<?php
+/**
+ * @copyright 2017, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OCA\DAV\Migration;
+
+use Doctrine\DBAL\Schema\Schema;
+use OCP\Migration\SimpleMigrationStep;
+use OCP\Migration\IOutput;
+
+class Version1004Date20170924124212 extends SimpleMigrationStep {
+
+	/**
+	 * @param IOutput $output
+	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param array $options
+	 * @return null|Schema
+	 * @since 13.0.0
+	 */
+	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
+		/** @var Schema $schema */
+		$schema = $schemaClosure();
+
+		$table = $schema->getTable('cards');
+		$table->addIndex(['addressbookid']);
+
+		$table = $schema->getTable('cards_properties');
+		$table->addIndex(['addressbookid']);
+
+		return $schema;
+	}
+}