diff --git a/app/classes/Framadate/Migrations/Version20180525110000.php b/app/classes/Framadate/Migrations/Version20180525110000.php
new file mode 100644
index 0000000..b2d1e46
--- /dev/null
+++ b/app/classes/Framadate/Migrations/Version20180525110000.php
@@ -0,0 +1,100 @@
+<?php
+/**
+ * This software is governed by the CeCILL-B license. If a copy of this license
+ * is not distributed with this file, you can obtain one at
+ * http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.txt
+ *
+ * Authors of STUdS (initial project): Guilhem BORGHESI (borghesi@unistra.fr) and Raphaël DROZ
+ * Authors of Framadate/OpenSondage: Framasoft (https://github.com/framasoft)
+ *
+ * =============================
+ *
+ * Ce logiciel est régi par la licence CeCILL-B. Si une copie de cette licence
+ * ne se trouve pas avec ce fichier vous pouvez l'obtenir sur
+ * http://www.cecill.info/licences/Licence_CeCILL-B_V1-fr.txt
+ *
+ * Auteurs de STUdS (projet initial) : Guilhem BORGHESI (borghesi@unistra.fr) et Raphaël DROZ
+ * Auteurs de Framadate/OpenSondage : Framasoft (https://github.com/framasoft)
+ */
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Framadate\AbstractMigration;
+use Framadate\Utils;
+
+/**
+ * This migration adds the column collect_users_mail in the poll table
+ *
+ * @package Framadate\Migration
+ * @version 1.2
+ */
+class Version20180525110000 extends AbstractMigration
+{
+    /**
+     * This method should describe in english what is the purpose of the migration class.
+     *
+     * @return string The description of the migration class
+     */
+    public function description()
+    {
+        return 'Change column collect_users_mail in table poll from boolean to smallint';
+    }
+
+    /**
+     * @param Schema $schema
+     * @throws \Doctrine\DBAL\Schema\SchemaException
+     * @throws \Doctrine\DBAL\DBALException
+     */
+    public function up(Schema $schema)
+    {
+        $poll = $schema->getTable(Utils::table('poll'));
+        $poll->addColumn('collect_users_mail_integer', 'smallint', ['default' => 0]);
+    }
+
+    /**
+     * @param Schema $schema
+     */
+    public function postUp(Schema $schema)
+    {
+        $this->addSql('UPDATE ' . Utils::table('poll') . ' SET collect_users_mail_integer = collect_users_mail');
+        $this->addSql('ALTER TABLE ' . Utils::table('poll') . ' DROP COLUMN collect_users_mail');
+        if ($this->connection->getDatabasePlatform()->getName() === 'mysql') {
+            $this->addSql(
+                'ALTER TABLE ' . Utils::table('poll') . ' CHANGE collect_users_mail_integer collect_users_mail SMALLINT'
+            );
+        } else {
+            $this->addSql(
+                'ALTER TABLE ' . Utils::table('poll') . ' RENAME COLUMN collect_users_mail_integer to collect_users_mail'
+            );
+        }
+    }
+
+    /**
+     * @param Schema $schema
+     * @throws \Doctrine\DBAL\Schema\SchemaException
+     */
+    public function down(Schema $schema)
+    {
+        $poll = $schema->getTable(Utils::table('poll'));
+        $poll->addColumn('collect_users_mail_boolean', 'boolean', ['default' => false]);
+    }
+
+    /**
+     * @param Schema $schema
+     */
+    public function postDown(Schema $schema)
+    {
+        $this->addSql('UPDATE ' . Utils::table('poll') . ' SET collect_users_mail_boolean = collect_users_mail > 0');
+        $this->addSql('ALTER TABLE ' . Utils::table('poll') . ' DROP COLUMN collect_users_mail');
+
+        if ($this->connection->getDatabasePlatform()->getName() === 'mysql') {
+            $this->addSql(
+                'ALTER TABLE ' . Utils::table('poll') . ' CHANGE collect_users_mail_boolean collect_users_mail SMALLINT'
+            );
+        } else {
+            $this->addSql(
+                'ALTER TABLE ' . Utils::table('poll') . ' RENAME COLUMN collect_users_mail_boolean to collect_users_mail'
+            );
+        }
+    }
+}