Use utf8mb4 encoding for MySQL instead of utf8

3 files changed, 214 insertions, 144 deletions

diff --git a/app/Schema/Mysql.php b/app/Schema/Mysql.php
index 6adcaec1..c5144663 100644
--- a/app/Schema/Mysql.php
+++ b/app/Schema/Mysql.php
@@ -8,7 +8,77 @@ use PDO;
 use Kanboard\Core\Security\Token;
 use Kanboard\Core\Security\Role;
 
-const VERSION = 129;
+const VERSION = 130;
+
+/*
+
+This migration convert table encoding to utf8mb4.
+You should also convert the database encoding:
+
+ALTER DATABASE kanboard CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci;
+
+You might need to run:
+
+REPAIR TABLE table_name;
+OPTIMIZE TABLE table_name;
+
+*/
+function version_130(PDO $pdo)
+{
+    $tables = [
+        'action_has_params',
+        'actions',
+        'column_has_move_restrictions',
+        'column_has_restrictions',
+        'columns',
+        'comments',
+        'currencies',
+        'custom_filters',
+        'group_has_users',
+        'groups',
+        'invites',
+        'last_logins',
+        'links',
+        'password_reset',
+        'plugin_schema_versions',
+        'predefined_task_descriptions',
+        'project_activities',
+        'project_daily_column_stats',
+        'project_daily_stats',
+        'project_has_categories',
+        'project_has_files',
+        'project_has_groups',
+        'project_has_metadata',
+        'project_has_notification_types',
+        'project_has_roles',
+        'project_has_users',
+        'project_role_has_restrictions',
+        'projects',
+        'remember_me',
+        'sessions',
+        'settings',
+        'subtask_time_tracking',
+        'subtasks',
+        'swimlanes',
+        'tags',
+        'task_has_external_links',
+        'task_has_files',
+        'task_has_links',
+        'task_has_metadata',
+        'task_has_tags',
+        'tasks',
+        'transitions',
+        'user_has_metadata',
+        'user_has_notification_types',
+        'user_has_notifications',
+        'user_has_unread_notifications',
+        'users',
+    ];
+
+    foreach ($tables as $table) {
+        $pdo->exec('ALTER TABLE `'.$table.'` CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci');
+    }
+}
 
 function version_129(PDO $pdo)
 {
diff --git a/app/Schema/Sql/mysql.sql b/app/Schema/Sql/mysql.sql
index 3113b4e6..7f46c872 100644
--- a/app/Schema/Sql/mysql.sql
+++ b/app/Schema/Sql/mysql.sql
@@ -15,12 +15,12 @@ DROP TABLE IF EXISTS `action_has_params`;
 CREATE TABLE `action_has_params` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `action_id` int(11) NOT NULL,
-  `name` text NOT NULL,
-  `value` text NOT NULL,
+  `name` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  `value` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
   PRIMARY KEY (`id`),
   KEY `action_id` (`action_id`),
   CONSTRAINT `action_has_params_ibfk_1` FOREIGN KEY (`action_id`) REFERENCES `actions` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `actions`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -28,12 +28,12 @@ DROP TABLE IF EXISTS `actions`;
 CREATE TABLE `actions` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `project_id` int(11) NOT NULL,
-  `event_name` text NOT NULL,
-  `action_name` text NOT NULL,
+  `event_name` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  `action_name` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
   PRIMARY KEY (`id`),
   KEY `project_id` (`project_id`),
   CONSTRAINT `actions_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `column_has_move_restrictions`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -54,7 +54,7 @@ CREATE TABLE `column_has_move_restrictions` (
   CONSTRAINT `column_has_move_restrictions_ibfk_2` FOREIGN KEY (`role_id`) REFERENCES `project_has_roles` (`role_id`) ON DELETE CASCADE,
   CONSTRAINT `column_has_move_restrictions_ibfk_3` FOREIGN KEY (`src_column_id`) REFERENCES `columns` (`id`) ON DELETE CASCADE,
   CONSTRAINT `column_has_move_restrictions_ibfk_4` FOREIGN KEY (`dst_column_id`) REFERENCES `columns` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `column_has_restrictions`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -64,7 +64,7 @@ CREATE TABLE `column_has_restrictions` (
   `project_id` int(11) NOT NULL,
   `role_id` int(11) NOT NULL,
   `column_id` int(11) NOT NULL,
-  `rule` varchar(255) NOT NULL,
+  `rule` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   PRIMARY KEY (`restriction_id`),
   UNIQUE KEY `role_id` (`role_id`,`column_id`,`rule`),
   KEY `project_id` (`project_id`),
@@ -72,24 +72,24 @@ CREATE TABLE `column_has_restrictions` (
   CONSTRAINT `column_has_restrictions_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE,
   CONSTRAINT `column_has_restrictions_ibfk_2` FOREIGN KEY (`role_id`) REFERENCES `project_has_roles` (`role_id`) ON DELETE CASCADE,
   CONSTRAINT `column_has_restrictions_ibfk_3` FOREIGN KEY (`column_id`) REFERENCES `columns` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `columns`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `columns` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `title` varchar(255) NOT NULL,
+  `title` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   `position` int(11) NOT NULL,
   `project_id` int(11) NOT NULL,
   `task_limit` int(11) DEFAULT '0',
-  `description` text,
+  `description` mediumtext COLLATE utf8mb4_unicode_ci,
   `hide_in_dashboard` int(11) NOT NULL DEFAULT '0',
   PRIMARY KEY (`id`),
   UNIQUE KEY `idx_title_project` (`title`,`project_id`),
   KEY `columns_project_idx` (`project_id`),
   CONSTRAINT `columns_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `comments`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -99,34 +99,34 @@ CREATE TABLE `comments` (
   `task_id` int(11) NOT NULL,
   `user_id` int(11) DEFAULT '0',
   `date_creation` bigint(20) DEFAULT NULL,
-  `comment` text,
-  `reference` varchar(255) DEFAULT '',
+  `comment` mediumtext COLLATE utf8mb4_unicode_ci,
+  `reference` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT '',
   `date_modification` bigint(20) DEFAULT NULL,
   PRIMARY KEY (`id`),
   KEY `user_id` (`user_id`),
   KEY `comments_reference_idx` (`reference`),
   KEY `comments_task_idx` (`task_id`),
   CONSTRAINT `comments_ibfk_1` FOREIGN KEY (`task_id`) REFERENCES `tasks` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `currencies`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `currencies` (
-  `currency` char(3) NOT NULL,
+  `currency` char(3) COLLATE utf8mb4_unicode_ci NOT NULL,
   `rate` float DEFAULT '0',
   UNIQUE KEY `currency` (`currency`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `custom_filters`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `custom_filters` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `filter` text NOT NULL,
+  `filter` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
   `project_id` int(11) NOT NULL,
   `user_id` int(11) NOT NULL,
-  `name` text NOT NULL,
+  `name` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
   `is_shared` tinyint(1) DEFAULT '0',
   `append` tinyint(1) DEFAULT '0',
   PRIMARY KEY (`id`),
@@ -134,7 +134,7 @@ CREATE TABLE `custom_filters` (
   KEY `user_id` (`user_id`),
   CONSTRAINT `custom_filters_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE,
   CONSTRAINT `custom_filters_ibfk_2` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `group_has_users`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -146,79 +146,79 @@ CREATE TABLE `group_has_users` (
   KEY `user_id` (`user_id`),
   CONSTRAINT `group_has_users_ibfk_1` FOREIGN KEY (`group_id`) REFERENCES `groups` (`id`) ON DELETE CASCADE,
   CONSTRAINT `group_has_users_ibfk_2` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `groups`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `groups` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `external_id` varchar(255) DEFAULT '',
-  `name` varchar(255) NOT NULL,
+  `external_id` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT '',
+  `name` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   PRIMARY KEY (`id`),
   UNIQUE KEY `name` (`name`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `invites`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `invites` (
-  `email` varchar(255) NOT NULL,
+  `email` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   `project_id` int(11) NOT NULL,
-  `token` varchar(255) NOT NULL,
+  `token` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   PRIMARY KEY (`email`,`token`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `last_logins`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `last_logins` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `auth_type` varchar(25) DEFAULT NULL,
+  `auth_type` varchar(25) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `user_id` int(11) DEFAULT NULL,
-  `ip` varchar(45) DEFAULT NULL,
-  `user_agent` varchar(255) DEFAULT NULL,
+  `ip` varchar(45) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `user_agent` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `date_creation` bigint(20) DEFAULT NULL,
   PRIMARY KEY (`id`),
   KEY `user_id` (`user_id`),
   CONSTRAINT `last_logins_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `links`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `links` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `label` varchar(255) NOT NULL,
+  `label` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   `opposite_id` int(11) DEFAULT '0',
   PRIMARY KEY (`id`),
   UNIQUE KEY `label` (`label`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `password_reset`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `password_reset` (
-  `token` varchar(80) NOT NULL,
+  `token` varchar(80) COLLATE utf8mb4_unicode_ci NOT NULL,
   `user_id` int(11) NOT NULL,
   `date_expiration` int(11) NOT NULL,
   `date_creation` int(11) NOT NULL,
-  `ip` varchar(45) NOT NULL,
-  `user_agent` varchar(255) NOT NULL,
+  `ip` varchar(45) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `user_agent` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   `is_active` tinyint(1) NOT NULL,
   PRIMARY KEY (`token`),
   KEY `user_id` (`user_id`),
   CONSTRAINT `password_reset_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `plugin_schema_versions`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `plugin_schema_versions` (
-  `plugin` varchar(80) NOT NULL,
+  `plugin` varchar(80) COLLATE utf8mb4_unicode_ci NOT NULL,
   `version` int(11) NOT NULL DEFAULT '0',
   PRIMARY KEY (`plugin`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `predefined_task_descriptions`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -226,12 +226,12 @@ DROP TABLE IF EXISTS `predefined_task_descriptions`;
 CREATE TABLE `predefined_task_descriptions` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `project_id` int(11) NOT NULL,
-  `title` text NOT NULL,
-  `description` text NOT NULL,
+  `title` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  `description` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
   PRIMARY KEY (`id`),
   KEY `project_id` (`project_id`),
   CONSTRAINT `predefined_task_descriptions_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `project_activities`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -239,11 +239,11 @@ DROP TABLE IF EXISTS `project_activities`;
 CREATE TABLE `project_activities` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `date_creation` bigint(20) DEFAULT NULL,
-  `event_name` text NOT NULL,
+  `event_name` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
   `creator_id` int(11) DEFAULT NULL,
   `project_id` int(11) DEFAULT NULL,
   `task_id` int(11) DEFAULT NULL,
-  `data` text,
+  `data` mediumtext COLLATE utf8mb4_unicode_ci,
   PRIMARY KEY (`id`),
   KEY `creator_id` (`creator_id`),
   KEY `project_id` (`project_id`),
@@ -251,14 +251,14 @@ CREATE TABLE `project_activities` (
   CONSTRAINT `project_activities_ibfk_1` FOREIGN KEY (`creator_id`) REFERENCES `users` (`id`) ON DELETE CASCADE,
   CONSTRAINT `project_activities_ibfk_2` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE,
   CONSTRAINT `project_activities_ibfk_3` FOREIGN KEY (`task_id`) REFERENCES `tasks` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `project_daily_column_stats`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `project_daily_column_stats` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `day` char(10) NOT NULL,
+  `day` char(10) COLLATE utf8mb4_unicode_ci NOT NULL,
   `project_id` int(11) NOT NULL,
   `column_id` int(11) NOT NULL,
   `total` int(11) NOT NULL DEFAULT '0',
@@ -269,14 +269,14 @@ CREATE TABLE `project_daily_column_stats` (
   KEY `project_id` (`project_id`),
   CONSTRAINT `project_daily_column_stats_ibfk_1` FOREIGN KEY (`column_id`) REFERENCES `columns` (`id`) ON DELETE CASCADE,
   CONSTRAINT `project_daily_column_stats_ibfk_2` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `project_daily_stats`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `project_daily_stats` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `day` char(10) NOT NULL,
+  `day` char(10) COLLATE utf8mb4_unicode_ci NOT NULL,
   `project_id` int(11) NOT NULL,
   `avg_lead_time` int(11) NOT NULL DEFAULT '0',
   `avg_cycle_time` int(11) NOT NULL DEFAULT '0',
@@ -284,21 +284,21 @@ CREATE TABLE `project_daily_stats` (
   UNIQUE KEY `project_daily_stats_idx` (`day`,`project_id`),
   KEY `project_id` (`project_id`),
   CONSTRAINT `project_daily_stats_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `project_has_categories`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `project_has_categories` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `name` varchar(255) NOT NULL,
+  `name` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   `project_id` int(11) NOT NULL,
-  `description` text,
+  `description` mediumtext COLLATE utf8mb4_unicode_ci,
   PRIMARY KEY (`id`),
   UNIQUE KEY `idx_project_category` (`project_id`,`name`),
   KEY `categories_project_idx` (`project_id`),
   CONSTRAINT `project_has_categories_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `project_has_files`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -306,8 +306,8 @@ DROP TABLE IF EXISTS `project_has_files`;
 CREATE TABLE `project_has_files` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `project_id` int(11) NOT NULL,
-  `name` text NOT NULL,
-  `path` text NOT NULL,
+  `name` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  `path` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
   `is_image` tinyint(1) DEFAULT '0',
   `size` int(11) NOT NULL DEFAULT '0',
   `user_id` int(11) NOT NULL DEFAULT '0',
@@ -315,7 +315,7 @@ CREATE TABLE `project_has_files` (
   PRIMARY KEY (`id`),
   KEY `project_id` (`project_id`),
   CONSTRAINT `project_has_files_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `project_has_groups`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -323,25 +323,25 @@ DROP TABLE IF EXISTS `project_has_groups`;
 CREATE TABLE `project_has_groups` (
   `group_id` int(11) NOT NULL,
   `project_id` int(11) NOT NULL,
-  `role` varchar(255) NOT NULL,
+  `role` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   UNIQUE KEY `group_id` (`group_id`,`project_id`),
   KEY `project_id` (`project_id`),
   CONSTRAINT `project_has_groups_ibfk_1` FOREIGN KEY (`group_id`) REFERENCES `groups` (`id`) ON DELETE CASCADE,
   CONSTRAINT `project_has_groups_ibfk_2` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `project_has_metadata`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `project_has_metadata` (
   `project_id` int(11) NOT NULL,
-  `name` varchar(50) NOT NULL,
-  `value` varchar(255) DEFAULT '',
+  `name` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `value` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT '',
   `changed_by` int(11) NOT NULL DEFAULT '0',
   `changed_on` int(11) NOT NULL DEFAULT '0',
   UNIQUE KEY `project_id` (`project_id`,`name`),
   CONSTRAINT `project_has_metadata_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `project_has_notification_types`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -349,23 +349,23 @@ DROP TABLE IF EXISTS `project_has_notification_types`;
 CREATE TABLE `project_has_notification_types` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `project_id` int(11) NOT NULL,
-  `notification_type` varchar(50) NOT NULL,
+  `notification_type` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
   PRIMARY KEY (`id`),
   UNIQUE KEY `project_id` (`project_id`,`notification_type`),
   CONSTRAINT `project_has_notification_types_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `project_has_roles`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `project_has_roles` (
   `role_id` int(11) NOT NULL AUTO_INCREMENT,
-  `role` varchar(255) NOT NULL,
+  `role` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   `project_id` int(11) NOT NULL,
   PRIMARY KEY (`role_id`),
   UNIQUE KEY `project_id` (`project_id`,`role`),
   CONSTRAINT `project_has_roles_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `project_has_users`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -373,12 +373,12 @@ DROP TABLE IF EXISTS `project_has_users`;
 CREATE TABLE `project_has_users` (
   `project_id` int(11) NOT NULL,
   `user_id` int(11) NOT NULL,
-  `role` varchar(255) NOT NULL,
+  `role` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   UNIQUE KEY `idx_project_user` (`project_id`,`user_id`),
   KEY `user_id` (`user_id`),
   CONSTRAINT `project_has_users_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE,
   CONSTRAINT `project_has_users_ibfk_2` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `project_role_has_restrictions`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -387,37 +387,37 @@ CREATE TABLE `project_role_has_restrictions` (
   `restriction_id` int(11) NOT NULL AUTO_INCREMENT,
   `project_id` int(11) NOT NULL,
   `role_id` int(11) NOT NULL,
-  `rule` varchar(255) NOT NULL,
+  `rule` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   PRIMARY KEY (`restriction_id`),
   UNIQUE KEY `role_id` (`role_id`,`rule`),
   KEY `project_id` (`project_id`),
   CONSTRAINT `project_role_has_restrictions_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE,
   CONSTRAINT `project_role_has_restrictions_ibfk_2` FOREIGN KEY (`role_id`) REFERENCES `project_has_roles` (`role_id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `projects`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `projects` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `name` text NOT NULL,
+  `name` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
   `is_active` tinyint(4) DEFAULT '1',
-  `token` varchar(255) DEFAULT NULL,
+  `token` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `last_modified` bigint(20) DEFAULT NULL,
   `is_public` tinyint(1) DEFAULT '0',
   `is_private` tinyint(1) DEFAULT '0',
-  `description` text,
-  `identifier` varchar(50) DEFAULT '',
-  `start_date` varchar(10) DEFAULT '',
-  `end_date` varchar(10) DEFAULT '',
+  `description` mediumtext COLLATE utf8mb4_unicode_ci,
+  `identifier` varchar(50) COLLATE utf8mb4_unicode_ci DEFAULT '',
+  `start_date` varchar(10) COLLATE utf8mb4_unicode_ci DEFAULT '',
+  `end_date` varchar(10) COLLATE utf8mb4_unicode_ci DEFAULT '',
   `owner_id` int(11) DEFAULT '0',
   `priority_default` int(11) DEFAULT '0',
   `priority_start` int(11) DEFAULT '0',
   `priority_end` int(11) DEFAULT '3',
-  `email` text,
-  `predefined_email_subjects` text,
+  `email` mediumtext COLLATE utf8mb4_unicode_ci,
+  `predefined_email_subjects` mediumtext COLLATE utf8mb4_unicode_ci,
   PRIMARY KEY (`id`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `remember_me`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -425,16 +425,16 @@ DROP TABLE IF EXISTS `remember_me`;
 CREATE TABLE `remember_me` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `user_id` int(11) DEFAULT NULL,
-  `ip` varchar(45) DEFAULT NULL,
-  `user_agent` varchar(255) DEFAULT NULL,
-  `token` varchar(255) DEFAULT NULL,
-  `sequence` varchar(255) DEFAULT NULL,
+  `ip` varchar(45) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `user_agent` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `token` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `sequence` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `expiration` int(11) DEFAULT NULL,
   `date_creation` bigint(20) DEFAULT NULL,
   PRIMARY KEY (`id`),
   KEY `user_id` (`user_id`),
   CONSTRAINT `remember_me_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `schema_version`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -447,22 +447,22 @@ DROP TABLE IF EXISTS `sessions`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `sessions` (
-  `id` varchar(255) NOT NULL,
+  `id` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   `expire_at` int(11) NOT NULL,
-  `data` longtext,
+  `data` longtext COLLATE utf8mb4_unicode_ci,
   PRIMARY KEY (`id`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `settings`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `settings` (
-  `option` varchar(100) NOT NULL,
-  `value` text,
+  `option` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `value` mediumtext COLLATE utf8mb4_unicode_ci,
   `changed_by` int(11) NOT NULL DEFAULT '0',
   `changed_on` int(11) NOT NULL DEFAULT '0',
   PRIMARY KEY (`option`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `subtask_time_tracking`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -479,14 +479,14 @@ CREATE TABLE `subtask_time_tracking` (
   KEY `subtask_id` (`subtask_id`),
   CONSTRAINT `subtask_time_tracking_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE,
   CONSTRAINT `subtask_time_tracking_ibfk_2` FOREIGN KEY (`subtask_id`) REFERENCES `subtasks` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `subtasks`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `subtasks` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `title` text NOT NULL,
+  `title` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
   `status` int(11) DEFAULT '0',
   `time_estimated` float DEFAULT NULL,
   `time_spent` float DEFAULT NULL,
@@ -496,44 +496,44 @@ CREATE TABLE `subtasks` (
   PRIMARY KEY (`id`),
   KEY `subtasks_task_idx` (`task_id`),
   CONSTRAINT `subtasks_ibfk_1` FOREIGN KEY (`task_id`) REFERENCES `tasks` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `swimlanes`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `swimlanes` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `name` varchar(255) NOT NULL,
+  `name` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   `position` int(11) DEFAULT '1',
   `is_active` int(11) DEFAULT '1',
   `project_id` int(11) DEFAULT NULL,
-  `description` text,
+  `description` mediumtext COLLATE utf8mb4_unicode_ci,
   PRIMARY KEY (`id`),
   UNIQUE KEY `name` (`name`,`project_id`),
   KEY `swimlanes_project_idx` (`project_id`),
   CONSTRAINT `swimlanes_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `tags`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `tags` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `name` varchar(255) NOT NULL,
+  `name` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
   `project_id` int(11) NOT NULL,
   PRIMARY KEY (`id`),
   UNIQUE KEY `project_id` (`project_id`,`name`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `task_has_external_links`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `task_has_external_links` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `link_type` varchar(100) NOT NULL,
-  `dependency` varchar(100) NOT NULL,
-  `title` text NOT NULL,
-  `url` text NOT NULL,
+  `link_type` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `dependency` varchar(100) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `title` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  `url` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
   `date_creation` int(11) NOT NULL,
   `date_modification` int(11) NOT NULL,
   `task_id` int(11) NOT NULL,
@@ -541,15 +541,15 @@ CREATE TABLE `task_has_external_links` (
   PRIMARY KEY (`id`),
   KEY `task_id` (`task_id`),
   CONSTRAINT `task_has_external_links_ibfk_1` FOREIGN KEY (`task_id`) REFERENCES `tasks` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `task_has_files`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `task_has_files` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `name` text NOT NULL,
-  `path` text NOT NULL,
+  `name` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  `path` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
   `is_image` tinyint(1) DEFAULT '0',
   `task_id` int(11) NOT NULL,
   `date` bigint(20) DEFAULT NULL,
@@ -558,7 +558,7 @@ CREATE TABLE `task_has_files` (
   PRIMARY KEY (`id`),
   KEY `files_task_idx` (`task_id`),
   CONSTRAINT `task_has_files_ibfk_1` FOREIGN KEY (`task_id`) REFERENCES `tasks` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `task_has_links`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -575,20 +575,20 @@ CREATE TABLE `task_has_links` (
   CONSTRAINT `task_has_links_ibfk_1` FOREIGN KEY (`link_id`) REFERENCES `links` (`id`) ON DELETE CASCADE,
   CONSTRAINT `task_has_links_ibfk_2` FOREIGN KEY (`task_id`) REFERENCES `tasks` (`id`) ON DELETE CASCADE,
   CONSTRAINT `task_has_links_ibfk_3` FOREIGN KEY (`opposite_task_id`) REFERENCES `tasks` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `task_has_metadata`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `task_has_metadata` (
   `task_id` int(11) NOT NULL,
-  `name` varchar(50) NOT NULL,
-  `value` varchar(255) DEFAULT '',
+  `name` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `value` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT '',
   `changed_by` int(11) NOT NULL DEFAULT '0',
   `changed_on` int(11) NOT NULL DEFAULT '0',
   UNIQUE KEY `task_id` (`task_id`,`name`),
   CONSTRAINT `task_has_metadata_ibfk_1` FOREIGN KEY (`task_id`) REFERENCES `tasks` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `task_has_tags`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -600,19 +600,19 @@ CREATE TABLE `task_has_tags` (
   KEY `task_id` (`task_id`),
   CONSTRAINT `task_has_tags_ibfk_1` FOREIGN KEY (`task_id`) REFERENCES `tasks` (`id`) ON DELETE CASCADE,
   CONSTRAINT `task_has_tags_ibfk_2` FOREIGN KEY (`tag_id`) REFERENCES `tags` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `tasks`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `tasks` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `title` text NOT NULL,
-  `description` text,
+  `title` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  `description` mediumtext COLLATE utf8mb4_unicode_ci,
   `date_creation` bigint(20) DEFAULT NULL,
   `date_completed` bigint(20) DEFAULT NULL,
   `date_due` bigint(20) DEFAULT NULL,
-  `color_id` varchar(50) DEFAULT NULL,
+  `color_id` varchar(50) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `project_id` int(11) NOT NULL,
   `column_id` int(11) NOT NULL,
   `owner_id` int(11) DEFAULT '0',
@@ -622,7 +622,7 @@ CREATE TABLE `tasks` (
   `category_id` int(11) DEFAULT '0',
   `creator_id` int(11) DEFAULT '0',
   `date_modification` int(11) DEFAULT '0',
-  `reference` varchar(255) DEFAULT '',
+  `reference` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT '',
   `date_started` bigint(20) DEFAULT NULL,
   `time_spent` float DEFAULT '0',
   `time_estimated` float DEFAULT '0',
@@ -636,8 +636,8 @@ CREATE TABLE `tasks` (
   `recurrence_parent` int(11) DEFAULT NULL,
   `recurrence_child` int(11) DEFAULT NULL,
   `priority` int(11) DEFAULT '0',
-  `external_provider` varchar(255) DEFAULT NULL,
-  `external_uri` varchar(255) DEFAULT NULL,
+  `external_provider` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `external_uri` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   PRIMARY KEY (`id`),
   KEY `idx_task_active` (`is_active`),
   KEY `column_id` (`column_id`),
@@ -647,7 +647,7 @@ CREATE TABLE `tasks` (
   CONSTRAINT `tasks_ibfk_1` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE,
   CONSTRAINT `tasks_ibfk_2` FOREIGN KEY (`column_id`) REFERENCES `columns` (`id`) ON DELETE CASCADE,
   CONSTRAINT `tasks_swimlane_ibfk_1` FOREIGN KEY (`swimlane_id`) REFERENCES `swimlanes` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `transitions`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -672,20 +672,20 @@ CREATE TABLE `transitions` (
   CONSTRAINT `transitions_ibfk_3` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE,
   CONSTRAINT `transitions_ibfk_4` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE,
   CONSTRAINT `transitions_ibfk_5` FOREIGN KEY (`task_id`) REFERENCES `tasks` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `user_has_metadata`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `user_has_metadata` (
   `user_id` int(11) NOT NULL,
-  `name` varchar(50) NOT NULL,
-  `value` varchar(255) DEFAULT '',
+  `name` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `value` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT '',
   `changed_by` int(11) NOT NULL DEFAULT '0',
   `changed_on` int(11) NOT NULL DEFAULT '0',
   UNIQUE KEY `user_id` (`user_id`,`name`),
   CONSTRAINT `user_has_metadata_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `user_has_notification_types`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -693,11 +693,11 @@ DROP TABLE IF EXISTS `user_has_notification_types`;
 CREATE TABLE `user_has_notification_types` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `user_id` int(11) NOT NULL,
-  `notification_type` varchar(50) DEFAULT NULL,
+  `notification_type` varchar(50) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   PRIMARY KEY (`id`),
   UNIQUE KEY `user_has_notification_types_user_idx` (`user_id`,`notification_type`),
   CONSTRAINT `user_has_notification_types_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `user_has_notifications`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -709,7 +709,7 @@ CREATE TABLE `user_has_notifications` (
   KEY `user_has_notifications_ibfk_2` (`project_id`),
   CONSTRAINT `user_has_notifications_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE,
   CONSTRAINT `user_has_notifications_ibfk_2` FOREIGN KEY (`project_id`) REFERENCES `projects` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `user_has_unread_notifications`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
@@ -718,44 +718,44 @@ CREATE TABLE `user_has_unread_notifications` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `user_id` int(11) NOT NULL,
   `date_creation` bigint(20) NOT NULL,
-  `event_name` text NOT NULL,
-  `event_data` text NOT NULL,
+  `event_name` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
+  `event_data` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL,
   PRIMARY KEY (`id`),
   KEY `user_id` (`user_id`),
   CONSTRAINT `user_has_unread_notifications_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 DROP TABLE IF EXISTS `users`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `users` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `username` varchar(255) NOT NULL,
-  `password` varchar(255) DEFAULT NULL,
+  `username` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
+  `password` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `is_ldap_user` tinyint(1) DEFAULT '0',
-  `name` varchar(255) DEFAULT NULL,
-  `email` varchar(255) DEFAULT NULL,
-  `google_id` varchar(30) DEFAULT NULL,
-  `github_id` varchar(30) DEFAULT NULL,
+  `name` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `email` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `google_id` varchar(30) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `github_id` varchar(30) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `notifications_enabled` tinyint(1) DEFAULT '0',
-  `timezone` varchar(50) DEFAULT NULL,
-  `language` varchar(5) DEFAULT NULL,
+  `timezone` varchar(50) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `language` varchar(5) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
   `disable_login_form` tinyint(1) DEFAULT '0',
   `twofactor_activated` tinyint(1) DEFAULT '0',
-  `twofactor_secret` char(16) DEFAULT NULL,
-  `token` varchar(255) DEFAULT '',
+  `twofactor_secret` char(16) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `token` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT '',
   `notifications_filter` int(11) DEFAULT '4',
   `nb_failed_login` int(11) DEFAULT '0',
   `lock_expiration_date` bigint(20) DEFAULT NULL,
   `gitlab_id` int(11) DEFAULT NULL,
-  `role` varchar(25) NOT NULL DEFAULT 'app-user',
+  `role` varchar(25) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT 'app-user',
   `is_active` tinyint(1) DEFAULT '1',
-  `avatar_path` varchar(255) DEFAULT NULL,
-  `api_access_token` varchar(255) DEFAULT NULL,
-  `filter` text,
+  `avatar_path` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `api_access_token` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
+  `filter` mediumtext COLLATE utf8mb4_unicode_ci,
   PRIMARY KEY (`id`),
   UNIQUE KEY `users_username_idx` (`username`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;
 /*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
 
@@ -805,4 +805,4 @@ UNLOCK TABLES;
 /*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
 /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
 
-INSERT INTO users (username, password, role) VALUES ('admin', '$2y$10$eu5txjAlmBRZYmAcWjHAx.BSCIYL6RMTIyrIWG4eqWFtf62DCJPWy', 'app-admin');INSERT INTO schema_version VALUES ('129');
+INSERT INTO users (username, password, role) VALUES ('admin', '$2y$10$wHAStAxKXclzpBY4hRwL0e/LMNpxB5o50qwtO6I4OtJjIfB4stZIO', 'app-admin');INSERT INTO schema_version VALUES ('130');
diff --git a/app/ServiceProvider/DatabaseProvider.php b/app/ServiceProvider/DatabaseProvider.php
index 704e8079..40413b73 100644
--- a/app/ServiceProvider/DatabaseProvider.php
+++ b/app/ServiceProvider/DatabaseProvider.php
@@ -130,7 +130,7 @@ class DatabaseProvider implements ServiceProviderInterface
             'username' => DB_USERNAME,
             'password' => DB_PASSWORD,
             'database' => DB_NAME,
-            'charset'  => 'utf8',
+            'charset'  => 'utf8mb4',
             'port'     => DB_PORT,
             'ssl_key'  => DB_SSL_KEY,
             'ssl_ca'   => DB_SSL_CA,