diff --git a/lib/Migration/Version0002Date20190226000001.php b/lib/Migration/Version0002Date20190226000001.php
new file mode 100644
index 00000000..bdc6c232
--- /dev/null
+++ b/lib/Migration/Version0002Date20190226000001.php
@@ -0,0 +1,154 @@
+<?php
+declare(strict_types=1);
+
+
+/**
+ * Nextcloud - Social Support
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later. See the COPYING file.
+ *
+ * @author Maxence Lange <maxence@artificial-owl.com>
+ * @copyright 2018, Maxence Lange <maxence@artificial-owl.com>
+ * @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\Social\Migration;
+
+
+use Closure;
+use Doctrine\DBAL\DBALException;
+use Doctrine\DBAL\Schema\SchemaException;
+use Doctrine\DBAL\Types\Type;
+use OCA\Social\Db\CoreRequestBuilder;
+use OCP\DB\ISchemaWrapper;
+use OCP\IDBConnection;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+
+/**
+ * Class Version0002Date20190226000001
+ *
+ * @package OCA\Social\Migration
+ */
+class Version0002Date20190226000001 extends SimpleMigrationStep {
+
+
+	/** @var IDBConnection */
+	private $connection;
+
+
+	/** @var array */
+	public static $editToChar2000 = [
+		[CoreRequestBuilder::TABLE_CACHE_ACTORS, 'id'],
+		[CoreRequestBuilder::TABLE_CACHE_ACTORS, 'following'],
+		[CoreRequestBuilder::TABLE_CACHE_ACTORS, 'followers'],
+		[CoreRequestBuilder::TABLE_CACHE_ACTORS, 'inbox'],
+		[CoreRequestBuilder::TABLE_CACHE_ACTORS, 'shared_inbox'],
+		[CoreRequestBuilder::TABLE_CACHE_ACTORS, 'outbox'],
+		[CoreRequestBuilder::TABLE_CACHE_ACTORS, 'featured'],
+		[CoreRequestBuilder::TABLE_CACHE_ACTORS, 'url'],
+		[CoreRequestBuilder::TABLE_CACHE_ACTORS, 'icon_id'],
+
+		[CoreRequestBuilder::TABLE_CACHE_DOCUMENTS, 'id'],
+		[CoreRequestBuilder::TABLE_CACHE_DOCUMENTS, 'url'],
+		[CoreRequestBuilder::TABLE_CACHE_DOCUMENTS, 'local_copy'],
+
+		[CoreRequestBuilder::TABLE_REQUEST_QUEUE, 'author'],
+
+		[CoreRequestBuilder::TABLE_SERVER_ACTORS, 'id'],
+
+		[CoreRequestBuilder::TABLE_SERVER_FOLLOWS, 'id'],
+		[CoreRequestBuilder::TABLE_SERVER_FOLLOWS, 'actor_id'],
+		[CoreRequestBuilder::TABLE_SERVER_FOLLOWS, 'object_id'],
+		[CoreRequestBuilder::TABLE_SERVER_FOLLOWS, 'follow_id'],
+
+		[CoreRequestBuilder::TABLE_SERVER_NOTES, 'id'],
+		[CoreRequestBuilder::TABLE_SERVER_NOTES, 'to'],
+		[CoreRequestBuilder::TABLE_SERVER_NOTES, 'attributed_to'],
+		[CoreRequestBuilder::TABLE_SERVER_NOTES, 'in_reply_to']
+	];
+
+	/** @var array */
+	public static $editToText = [
+		[CoreRequestBuilder::TABLE_CACHE_ACTORS, 'public_key'],
+
+		[CoreRequestBuilder::TABLE_REQUEST_QUEUE, 'instance'],
+
+		[CoreRequestBuilder::TABLE_SERVER_ACTORS, 'public_key'],
+		[CoreRequestBuilder::TABLE_SERVER_ACTORS, 'private_key']
+	];
+
+
+	/**
+	 * @param IDBConnection $connection
+	 */
+	public function __construct(IDBConnection $connection) {
+		$this->connection = $connection;
+	}
+
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 *
+	 * @return ISchemaWrapper
+	 * @throws SchemaException
+	 * @throws DBALException
+	 */
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options
+	): ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		foreach (array_merge(self::$editToText, self::$editToChar2000) as $edit) {
+			list($tableName, $field) = $edit;
+
+			$table = $schema->getTable($tableName);
+			if ($table->hasColumn($field . '_copy')) {
+				continue;
+			}
+
+			$table->addColumn($field . '_copy', Type::TEXT, ['notnull' => false]);
+		}
+
+		return $schema;
+	}
+
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 */
+	public function postSchemaChange(IOutput $output, Closure $schemaClosure, array $options) {
+
+		foreach (array_merge(self::$editToText, self::$editToChar2000) as $edit) {
+			list($tableName, $field) = $edit;
+
+			$qb = $this->connection->getQueryBuilder();
+			$qb->update($tableName)
+			   ->set($field . '_copy', $field)
+			   ->execute();
+		}
+	}
+
+}
+
diff --git a/lib/Migration/Version0002Date20190226000002.php b/lib/Migration/Version0002Date20190226000002.php
new file mode 100644
index 00000000..6405a6bb
--- /dev/null
+++ b/lib/Migration/Version0002Date20190226000002.php
@@ -0,0 +1,79 @@
+<?php
+declare(strict_types=1);
+
+
+/**
+ * Nextcloud - Social Support
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later. See the COPYING file.
+ *
+ * @author Maxence Lange <maxence@artificial-owl.com>
+ * @copyright 2018, Maxence Lange <maxence@artificial-owl.com>
+ * @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\Social\Migration;
+
+
+use Closure;
+use Doctrine\DBAL\Schema\SchemaException;
+use OCP\DB\ISchemaWrapper;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+
+/**
+ * Class Version0002Date20190226000002
+ *
+ * @package OCA\Social\Migration
+ */
+class Version0002Date20190226000002 extends SimpleMigrationStep {
+
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 *
+	 * @return ISchemaWrapper
+	 * @throws SchemaException
+	 */
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options
+	): ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		$edits = array_merge(
+			Version0002Date20190226000001::$editToText,
+			Version0002Date20190226000001::$editToChar2000
+		);
+		foreach ($edits as $edit) {
+			list($tableName, $field) = $edit;
+
+			$table = $schema->getTable($tableName);
+			if ($table->hasColumn($field) && $table->hasColumn($field . '_copy')) {
+				$table->dropColumn($field);
+			}
+		}
+
+		return $schema;
+	}
+
+}
+
diff --git a/lib/Migration/Version0002Date20190226000003.php b/lib/Migration/Version0002Date20190226000003.php
new file mode 100644
index 00000000..729811a7
--- /dev/null
+++ b/lib/Migration/Version0002Date20190226000003.php
@@ -0,0 +1,128 @@
+<?php
+declare(strict_types=1);
+
+
+/**
+ * Nextcloud - Social Support
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later. See the COPYING file.
+ *
+ * @author Maxence Lange <maxence@artificial-owl.com>
+ * @copyright 2018, Maxence Lange <maxence@artificial-owl.com>
+ * @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\Social\Migration;
+
+
+use Closure;
+use Doctrine\DBAL\DBALException;
+use Doctrine\DBAL\Schema\SchemaException;
+use Doctrine\DBAL\Types\Type;
+use OCP\DB\ISchemaWrapper;
+use OCP\IDBConnection;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+
+/**
+ * Class Version0002Date20190226000003
+ *
+ * @package OCA\Social\Migration
+ */
+class Version0002Date20190226000003 extends SimpleMigrationStep {
+
+
+	/** @var IDBConnection */
+	private $connection;
+
+
+	/**
+	 * @param IDBConnection $connection
+	 */
+	public function __construct(IDBConnection $connection) {
+		$this->connection = $connection;
+	}
+
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 *
+	 * @return ISchemaWrapper
+	 * @throws SchemaException
+	 * @throws DBALException
+	 */
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options
+	): ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		// -> TEXT
+		foreach (Version0002Date20190226000001::$editToText as $edit) {
+			list($tableName, $field) = $edit;
+
+			$table = $schema->getTable($tableName);
+			if ($table->hasColumn($field)) {
+				continue;
+			}
+
+			$table->addColumn($field, Type::TEXT, ['notnull' => false]);
+		}
+
+		// -> VARCHAR(4000)
+		foreach (Version0002Date20190226000001::$editToChar2000 as $edit) {
+			list($tableName, $field) = $edit;
+
+			$table = $schema->getTable($tableName);
+			if ($table->hasColumn($field)) {
+				continue;
+			}
+
+			$table->addColumn($field, Type::STRING, ['notnull' => false, 'length' => 2000]);
+		}
+
+		return $schema;
+	}
+
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 */
+	public function postSchemaChange(IOutput $output, Closure $schemaClosure, array $options) {
+
+		$edits = array_merge(
+			Version0002Date20190226000001::$editToText,
+			Version0002Date20190226000001::$editToChar2000
+		);
+		foreach ($edits as $edit) {
+			list($table, $field) = $edit;
+
+			$qb = $this->connection->getQueryBuilder();
+			$qb->update($table)
+			   ->set($field, $field . '_copy')
+			   ->execute();
+		}
+	}
+
+}
+
diff --git a/lib/Migration/Version0002Date20190226000004.php b/lib/Migration/Version0002Date20190226000004.php
new file mode 100644
index 00000000..50d34cec
--- /dev/null
+++ b/lib/Migration/Version0002Date20190226000004.php
@@ -0,0 +1,81 @@
+<?php
+declare(strict_types=1);
+
+
+/**
+ * Nextcloud - Social Support
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later. See the COPYING file.
+ *
+ * @author Maxence Lange <maxence@artificial-owl.com>
+ * @copyright 2018, Maxence Lange <maxence@artificial-owl.com>
+ * @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\Social\Migration;
+
+
+use Closure;
+use Doctrine\DBAL\DBALException;
+use Doctrine\DBAL\Schema\SchemaException;
+use OCP\DB\ISchemaWrapper;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+
+/**
+ * Class Version0002Date20190226000004
+ *
+ * @package OCA\Social\Migration
+ */
+class Version0002Date20190226000004 extends SimpleMigrationStep {
+
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 *
+	 * @return ISchemaWrapper
+	 * @throws SchemaException
+	 * @throws DBALException
+	 */
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options
+	): ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		$edits = array_merge(
+			Version0002Date20190226000001::$editToText,
+			Version0002Date20190226000001::$editToChar2000
+		);
+		foreach ($edits as $edit) {
+			list($tableName, $field) = $edit;
+
+			$table = $schema->getTable($tableName);
+			if ($table->hasColumn($field) && $table->hasColumn($field . '_copy')) {
+				$table->dropColumn($field . '_copy');
+			}
+		}
+
+		return $schema;
+	}
+
+}
+