diff --git a/lib/Migration/Version2000Date20170707093535.php b/lib/Migration/Version2000Date20170707093535.php
index 097af1ad6c2..3430e1aa8f7 100644
--- a/lib/Migration/Version2000Date20170707093535.php
+++ b/lib/Migration/Version2000Date20170707093535.php
@@ -22,8 +22,8 @@
  */
 namespace OCA\Spreed\Migration;
 
-use Doctrine\DBAL\Schema\Schema;
 use Doctrine\DBAL\Types\Type;
+use OCP\DB\ISchemaWrapper;
 use OCP\Migration\SimpleMigrationStep;
 use OCP\Migration\IOutput;
 
@@ -31,13 +31,13 @@ class Version2000Date20170707093535 extends SimpleMigrationStep {
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
-	 * @return null|Schema
+	 * @return null|ISchemaWrapper
 	 * @since 13.0.0
 	 */
 	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
-		/** @var Schema $schema */
+		/** @var ISchemaWrapper $schema */
 		$schema = $schemaClosure();
 
 		if (!$schema->hasTable('spreedme_messages')) {
diff --git a/lib/Migration/Version2000Date20171026140256.php b/lib/Migration/Version2000Date20171026140256.php
index 20659ef8405..2e1a8830f8a 100644
--- a/lib/Migration/Version2000Date20171026140256.php
+++ b/lib/Migration/Version2000Date20171026140256.php
@@ -53,7 +53,7 @@ public function __construct(IDBConnection $connection, IConfig $config, IGroupMa
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
 	 * @since 13.0.0
 	 */
diff --git a/lib/Migration/Version2000Date20171026140257.php b/lib/Migration/Version2000Date20171026140257.php
index a63dbce55a2..179e47165db 100644
--- a/lib/Migration/Version2000Date20171026140257.php
+++ b/lib/Migration/Version2000Date20171026140257.php
@@ -57,7 +57,7 @@ public function __construct(IDBConnection $connection, IConfig $config, ISecureR
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
 	 * @since 13.0.0
 	 */
diff --git a/lib/Migration/Version2001Date20170707115443.php b/lib/Migration/Version2001Date20170707115443.php
index c580ffa8deb..0ba55168dff 100644
--- a/lib/Migration/Version2001Date20170707115443.php
+++ b/lib/Migration/Version2001Date20170707115443.php
@@ -23,10 +23,10 @@
 namespace OCA\Spreed\Migration;
 
 use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
-use Doctrine\DBAL\Schema\Schema;
 use Doctrine\DBAL\Types\Type;
 use OCA\Spreed\Participant;
 use OCA\Spreed\Room;
+use OCP\DB\ISchemaWrapper;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IConfig;
 use OCP\IDBConnection;
@@ -52,13 +52,13 @@ public function __construct(IDBConnection $db, IConfig $config) {
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
-	 * @return null|Schema
+	 * @return null|ISchemaWrapper
 	 * @since 13.0.0
 	 */
 	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
-		/** @var Schema $schema */
+		/** @var ISchemaWrapper $schema */
 		$schema = $schemaClosure();
 		$table = $schema->getTable('spreedme_room_participants');
 
@@ -75,7 +75,7 @@ public function changeSchema(IOutput $output, \Closure $schemaClosure, array $op
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
 	 * @since 13.0.0
 	 */
diff --git a/lib/Migration/Version2001Date20170913104501.php b/lib/Migration/Version2001Date20170913104501.php
index a2b986c9716..29d10abbcf6 100644
--- a/lib/Migration/Version2001Date20170913104501.php
+++ b/lib/Migration/Version2001Date20170913104501.php
@@ -22,8 +22,8 @@
  */
 namespace OCA\Spreed\Migration;
 
-use Doctrine\DBAL\Schema\Schema;
 use Doctrine\DBAL\Types\Type;
+use OCP\DB\ISchemaWrapper;
 use OCP\Migration\SimpleMigrationStep;
 use OCP\Migration\IOutput;
 
@@ -31,13 +31,13 @@ class Version2001Date20170913104501 extends SimpleMigrationStep {
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
-	 * @return null|Schema
+	 * @return null|ISchemaWrapper
 	 * @since 13.0.0
 	 */
 	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
-		/** @var Schema $schema */
+		/** @var ISchemaWrapper $schema */
 		$schema = $schemaClosure();
 
 		if (!$schema->hasTable('videocalls_signaling')) {
diff --git a/lib/Migration/Version2001Date20170921145301.php b/lib/Migration/Version2001Date20170921145301.php
index 56191743007..ea0d419d9c9 100644
--- a/lib/Migration/Version2001Date20170921145301.php
+++ b/lib/Migration/Version2001Date20170921145301.php
@@ -22,8 +22,8 @@
  */
 namespace OCA\Spreed\Migration;
 
-use Doctrine\DBAL\Schema\Schema;
 use Doctrine\DBAL\Types\Type;
+use OCP\DB\ISchemaWrapper;
 use OCP\Migration\SimpleMigrationStep;
 use OCP\Migration\IOutput;
 
@@ -31,13 +31,13 @@ class Version2001Date20170921145301 extends SimpleMigrationStep {
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
-	 * @return null|Schema
+	 * @return null|ISchemaWrapper
 	 * @since 13.0.0
 	 */
 	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
-		/** @var Schema $schema */
+		/** @var ISchemaWrapper $schema */
 		$schema = $schemaClosure();
 
 		$table = $schema->getTable('spreedme_rooms');
diff --git a/lib/Migration/Version2001Date20170929092606.php b/lib/Migration/Version2001Date20170929092606.php
index 02e05473e95..e15b43024d6 100644
--- a/lib/Migration/Version2001Date20170929092606.php
+++ b/lib/Migration/Version2001Date20170929092606.php
@@ -40,7 +40,7 @@ public function __construct(IConfig $config) {
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
 	 * @since 13.0.0
 	 */
diff --git a/lib/Migration/Version2001Date20171009132424.php b/lib/Migration/Version2001Date20171009132424.php
index 9a1cacdb4d9..18e91fd1fe9 100644
--- a/lib/Migration/Version2001Date20171009132424.php
+++ b/lib/Migration/Version2001Date20171009132424.php
@@ -22,8 +22,8 @@
  */
 namespace OCA\Spreed\Migration;
 
-use Doctrine\DBAL\Schema\Schema;
 use Doctrine\DBAL\Types\Type;
+use OCP\DB\ISchemaWrapper;
 use OCP\Migration\SimpleMigrationStep;
 use OCP\Migration\IOutput;
 
@@ -31,13 +31,13 @@ class Version2001Date20171009132424 extends SimpleMigrationStep {
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
-	 * @return null|Schema
+	 * @return null|ISchemaWrapper
 	 * @since 13.0.0
 	 */
 	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
-		/** @var Schema $schema */
+		/** @var ISchemaWrapper $schema */
 		$schema = $schemaClosure();
 
 		$table = $schema->getTable('spreedme_rooms');
diff --git a/lib/Migration/Version2001Date20171026134605.php b/lib/Migration/Version2001Date20171026134605.php
index c5168ce6b91..58651322899 100644
--- a/lib/Migration/Version2001Date20171026134605.php
+++ b/lib/Migration/Version2001Date20171026134605.php
@@ -24,8 +24,8 @@
 
 use Doctrine\DBAL\Exception\TableNotFoundException;
 use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
-use Doctrine\DBAL\Schema\Schema;
 use Doctrine\DBAL\Types\Type;
+use OCP\DB\ISchemaWrapper;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IConfig;
 use OCP\IDBConnection;
@@ -51,13 +51,13 @@ public function __construct(IDBConnection $connection, IConfig $config) {
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
-	 * @return null|Schema
+	 * @return null|ISchemaWrapper
 	 * @since 13.0.0
 	 */
 	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
-		/** @var Schema $schema */
+		/** @var ISchemaWrapper $schema */
 		$schema = $schemaClosure();
 
 		if (!$schema->hasTable('talk_signaling')) {
@@ -154,7 +154,7 @@ public function changeSchema(IOutput $output, \Closure $schemaClosure, array $op
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
 	 * @since 13.0.0
 	 */
diff --git a/lib/Migration/Version2001Date20171026141336.php b/lib/Migration/Version2001Date20171026141336.php
index a4181c88944..32fda80977f 100644
--- a/lib/Migration/Version2001Date20171026141336.php
+++ b/lib/Migration/Version2001Date20171026141336.php
@@ -22,7 +22,7 @@
  */
 namespace OCA\Spreed\Migration;
 
-use Doctrine\DBAL\Schema\Schema;
+use OCP\DB\ISchemaWrapper;
 use OCP\Migration\SimpleMigrationStep;
 use OCP\Migration\IOutput;
 
@@ -30,13 +30,13 @@ class Version2001Date20171026141336 extends SimpleMigrationStep {
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
-	 * @return null|Schema
+	 * @return null|ISchemaWrapper
 	 * @since 13.0.0
 	 */
 	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
-		/** @var Schema $schema */
+		/** @var ISchemaWrapper $schema */
 		$schema = $schemaClosure();
 
 		if ($schema->hasTable('videocalls_signaling')) {
diff --git a/lib/Migration/Version2001Date20171031102049.php b/lib/Migration/Version2001Date20171031102049.php
index d25b5d804a4..30538516abd 100644
--- a/lib/Migration/Version2001Date20171031102049.php
+++ b/lib/Migration/Version2001Date20171031102049.php
@@ -22,8 +22,8 @@
  */
 namespace OCA\Spreed\Migration;
 
-use Doctrine\DBAL\Schema\Schema;
 use Doctrine\DBAL\Types\Type;
+use OCP\DB\ISchemaWrapper;
 use OCP\Migration\SimpleMigrationStep;
 use OCP\Migration\IOutput;
 
@@ -31,13 +31,13 @@ class Version2001Date20171031102049 extends SimpleMigrationStep {
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
-	 * @return null|Schema
+	 * @return null|ISchemaWrapper
 	 * @since 13.0.0
 	 */
 	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
-		/** @var Schema $schema */
+		/** @var ISchemaWrapper $schema */
 		$schema = $schemaClosure();
 
 
diff --git a/lib/Migration/Version2001Date20180103144447.php b/lib/Migration/Version2001Date20180103144447.php
index 21130d78ee1..0d1a333cc00 100644
--- a/lib/Migration/Version2001Date20180103144447.php
+++ b/lib/Migration/Version2001Date20180103144447.php
@@ -23,8 +23,8 @@
 namespace OCA\Spreed\Migration;
 
 use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
-use Doctrine\DBAL\Schema\Schema;
 use Doctrine\DBAL\Types\Type;
+use OCP\DB\ISchemaWrapper;
 use OCP\IConfig;
 use OCP\IDBConnection;
 use OCP\Migration\SimpleMigrationStep;
@@ -50,13 +50,13 @@ public function __construct(IDBConnection $connection, IConfig $config) {
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
-	 * @return null|Schema
+	 * @return null|ISchemaWrapper
 	 * @since 13.0.0
 	 */
 	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
-		/** @var Schema $schema */
+		/** @var ISchemaWrapper $schema */
 		$schema = $schemaClosure();
 
 		$table = $schema->getTable('talk_rooms');
@@ -113,7 +113,7 @@ public function changeSchema(IOutput $output, \Closure $schemaClosure, array $op
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
 	 * @since 13.0.0
 	 */
diff --git a/lib/Migration/Version2001Date20180103150836.php b/lib/Migration/Version2001Date20180103150836.php
index c44d29ba4cb..fb5fd5a61a8 100644
--- a/lib/Migration/Version2001Date20180103150836.php
+++ b/lib/Migration/Version2001Date20180103150836.php
@@ -22,7 +22,7 @@
  */
 namespace OCA\Spreed\Migration;
 
-use Doctrine\DBAL\Schema\Schema;
+use OCP\DB\ISchemaWrapper;
 use OCP\Migration\SimpleMigrationStep;
 use OCP\Migration\IOutput;
 
@@ -30,13 +30,13 @@ class Version2001Date20180103150836 extends SimpleMigrationStep {
 
 	/**
 	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
 	 * @param array $options
-	 * @return null|Schema
+	 * @return null|ISchemaWrapper
 	 * @since 13.0.0
 	 */
 	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
-		/** @var Schema $schema */
+		/** @var ISchemaWrapper $schema */
 		$schema = $schemaClosure();
 
 		$table = $schema->getTable('talk_rooms');