diff --git a/CLI/FetchToncoinTransactions.php b/CLI/FetchToncoinTransactions.php
index 9de2c998..171ea091 100755
--- a/CLI/FetchToncoinTransactions.php
+++ b/CLI/FetchToncoinTransactions.php
@@ -17,13 +17,16 @@ define("NANOTON", 1000000000);
 
 class FetchToncoinTransactions extends Command
 {
-    private $images;
+    private $transactions;
 
     protected static $defaultName = "fetch-ton";
 
     public function __construct()
     {
-        $this->transactions = DatabaseConnection::i()->getContext()->table("cryptotransactions");
+        $ctx = DatabaseConnection::i()->getContext();
+        if (in_array("cryptotransactions", $ctx->getStructure()->getTables())) {
+            $this->transactions = $ctx->table("cryptotransactions");
+        }
 
         parent::__construct();
     }
@@ -76,7 +79,6 @@ class FetchToncoinTransactions extends Command
 
         $header->writeln("Gonna up the balance of users");
         foreach ($response["result"] as $transfer) {
-            $outputArray;
             preg_match('/' . OPENVK_ROOT_CONF["openvk"]["preferences"]["ton"]["regex"] . '/', $transfer["in_msg"]["message"], $outputArray);
             $userId = ctype_digit($outputArray[1]) ? intval($outputArray[1]) : null;
             if (is_null($userId)) {
diff --git a/CLI/RebuildImagesCommand.php b/CLI/RebuildImagesCommand.php
index cbc9e49c..6340743c 100644
--- a/CLI/RebuildImagesCommand.php
+++ b/CLI/RebuildImagesCommand.php
@@ -20,7 +20,10 @@ class RebuildImagesCommand extends Command
 
     public function __construct()
     {
-        $this->images = DatabaseConnection::i()->getContext()->table("photos");
+        $ctx = DatabaseConnection::i()->getContext();
+        if (in_array("photos", $ctx->getStructure()->getTables())) {
+            $this->images = $ctx->table("photos");
+        }
 
         parent::__construct();
     }
diff --git a/CLI/UpgradeCommand.php b/CLI/UpgradeCommand.php
new file mode 100644
index 00000000..f0ef8f5d
--- /dev/null
+++ b/CLI/UpgradeCommand.php
@@ -0,0 +1,355 @@
+<?php
+
+declare(strict_types=1);
+
+namespace openvk\CLI;
+
+use Nette\Database\Connection;
+use Chandler\Database\DatabaseConnection;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Helper\ProgressBar;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+class UpgradeCommand extends Command
+{
+    protected static $defaultName = "upgrade";
+
+    private Connection $db;
+    private Connection $eventDb;
+
+    private array $chandlerTables = [
+        "CHANDLERACLPERMISSIONALIASES",
+        "CHANDLERACLGROUPSPERMISSIONS",
+        "CHANDLERACLUSERSPERMISSIONS",
+        "CHANDLERACLRELATIONS",
+        "CHANDLERGROUPS",
+        "CHANDLERTOKENS",
+        "CHANDLERUSERS",
+    ];
+
+    public function __construct()
+    {
+        $this->db = DatabaseConnection::i()->getConnection();
+        $this->eventDb = eventdb()->getConnection();
+
+        parent::__construct();
+    }
+
+    protected function configure(): void
+    {
+        $this->setDescription("Upgrade OpenVK installation")
+            ->setHelp("This command upgrades database schema after OpenVK was updated")
+            ->addOption(
+                "quick",
+                "Q",
+                InputOption::VALUE_NEGATABLE,
+                "Don't display warning before migrating database",
+                false
+            )
+            ->addOption(
+                "repair",
+                "R",
+                InputOption::VALUE_NEGATABLE,
+                "Attempt to repair database schema if tables are missing",
+                false
+            )
+            ->addOption(
+                "oneshot",
+                "O",
+                InputOption::VALUE_NONE,
+                "Only execute one operation"
+            )
+            ->addArgument(
+                "chandler",
+                InputArgument::OPTIONAL,
+                "Location of Chandler installation"
+            );
+    }
+
+    protected function checkDatabaseReadiness(bool &$chandlerOk, bool &$ovkOk, bool &$eventOk, bool &$migrationsOk): void
+    {
+        $tables = $this->db->query("SHOW TABLES")->fetchAll();
+        $tables = array_map(fn($x) => strtoupper($x->offsetGet(0)), $tables);
+
+        $missingTables = array_diff($this->chandlerTables, $tables);
+        if (sizeof($missingTables) == 0) {
+            $chandlerOk = true;
+        } elseif (sizeof($missingTables) == sizeof($this->chandlerTables)) {
+            $chandlerOk = null;
+        } else {
+            $chandlerOk = false;
+        }
+
+        if (is_null($this->eventDb)) {
+            $eventOk = false;
+        } elseif (is_null($this->eventDb->query("SHOW TABLES LIKE \"notifications\"")->fetch())) {
+            $eventOk = null;
+        } else {
+            $eventOk = true;
+        }
+
+        $ovkOk = in_array("PROFILES", $tables);
+        $migrationsOk = in_array("OVK_UPGRADE_HISTORY", $tables);
+    }
+
+    protected function executeSqlScript(
+        int $errCode,
+        string $script,
+        SymfonyStyle $io,
+        bool $transaction = false,
+        bool $eventDb = false
+    ): int {
+        $pdo = ($eventDb ? $this->eventDb : $this->db)->getPdo();
+
+        $res = false;
+        try {
+            if ($transaction) {
+                $res = $pdo->beginTransaction();
+            }
+
+            $res = $pdo->exec($script);
+
+            if ($transaction) {
+                $res = $pdo->commit();
+            }
+        } catch (\PDOException $e) {
+        }
+
+        if ($res === false) {
+            goto error;
+        }
+
+        return 0;
+
+        error:
+        $io->getErrorStyle()->error([
+            "Failed to execute SQL statement:",
+            implode("\t", $pdo->errorInfo()),
+        ]);
+
+        return $errCode;
+    }
+
+    protected function getNextLevel(bool $eventDb = false): int
+    {
+        $tbl = $eventDb ? "ovk_events_upgrade_history" : "ovk_upgrade_history";
+        $record = $this->db->query("SELECT level FROM $tbl ORDER BY level DESC LIMIT 1");
+        if (!$record->getRowCount()) {
+            return 0;
+        }
+
+        return $record->fetchField() + 1;
+    }
+
+    protected function getMigrationFiles(bool $eventDb = false): array
+    {
+        $files = [];
+        $root = dirname(__DIR__ . "/../install/init-static-db.sql");
+        $dir = $eventDb ? "sqls/eventdb" : "sqls";
+
+        foreach (glob("$root/$dir/*.sql") as $file) {
+            $files[(int) basename($file)] = basename($file);
+        }
+
+        ksort($files);
+
+        return $files;
+    }
+
+    protected function installChandler(InputInterface $input, SymfonyStyle $io, bool $drop = false): int
+    {
+        $chandlerLocation = $input->getArgument("chandler") ?? (__DIR__ . "/../../../../");
+        $chandlerConfigLocation = "$chandlerLocation/chandler.yml";
+
+        if (!file_exists($chandlerConfigLocation)) {
+            $err = ["Could not find chandler location. Perhaps your config is too unique?"];
+            if (!$input->getOption("chandler")) {
+                $err[] = "Specify absolute path to your chandler installation using the --chandler option.";
+            }
+
+            $io->getErrorStyle()->error($err);
+
+            return 21;
+        }
+
+        if ($drop) {
+            $bar = new ProgressBar($io, sizeof($this->chandlerTables));
+            $io->writeln("Dropping chandler tables...");
+
+            foreach ($bar->iterate($this->chandlerTables) as $table) {
+                $this->db->query("DROP TABLE IF EXISTS $table;");
+            }
+
+            $io->newLine();
+        }
+
+        $installFile = file_get_contents("$chandlerLocation/install/init-db.sql");
+
+        return $this->executeSqlScript(22, $installFile, $io);
+    }
+
+    protected function initSchema(SymfonyStyle $io): int
+    {
+        $installFile = file_get_contents(__DIR__ . "/../install/init-static-db.sql");
+
+        return $this->executeSqlScript(31, $installFile, $io);
+    }
+
+    protected function initEventSchema(SymfonyStyle $io): int
+    {
+        $installFile = file_get_contents(__DIR__ . "/../install/init-event-db.sql");
+
+        return $this->executeSqlScript(31, $installFile, $io, true, true);
+    }
+
+    protected function initUpgradeLog(SymfonyStyle $io): int
+    {
+        $installFile = file_get_contents(__DIR__ . "/../install/init-migration-table.sql");
+
+        return $this->executeSqlScript(31, $installFile, $io, true);
+    }
+
+    protected function runMigrations(SymfonyStyle $io, bool $eventDb, bool $oneshot): int
+    {
+        $dir = $eventDb ? "sqls/eventdb" : "sqls";
+        $tbl = $eventDb ? "ovk_events_upgrade_history" : "ovk_upgrade_history";
+        $nextLevel = $this->getNextLevel($eventDb);
+        $migrations = array_filter(
+            $this->getMigrationFiles($eventDb),
+            fn($id) => $id >= $nextLevel,
+            ARRAY_FILTER_USE_KEY
+        );
+
+        if (!sizeof($migrations)) {
+            return 24;
+        }
+
+        $uname = addslashes(`whoami`);
+        $bar = new ProgressBar($io, sizeof($migrations));
+        $bar->setFormat("very_verbose");
+
+        foreach ($bar->iterate($migrations) as $num => $migration) {
+            $script = file_get_contents(__DIR__ . "/../install/$dir/$migration");
+            $res = $this->executeSqlScript(100 + $num, $script, $io, true, $eventDb);
+            if ($res != 0) {
+                $io->getErrorStyle()->error("Error while executing migration №$num");
+
+                return $res;
+            }
+
+            $t = time();
+            $this->db->query("INSERT INTO $tbl VALUES ($num, $t, \"$uname\");");
+
+            if ($oneshot) {
+                return 5;
+            }
+        }
+
+        $io->newLine();
+
+        return 0;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $oneShotMode = $input->getOption("oneshot");
+        $io = new SymfonyStyle($input, $output);
+
+        if (!$input->getOption("quick")) {
+            $io->writeln("Do full backup of the database before executing this command!");
+            $io->writeln("Command will resume execution after 5 seconds.");
+            $io->writeln("You can skip this warning with --quick option.");
+            sleep(5);
+        }
+
+        $migrationsOk = false;
+        $chandlerOk = false;
+        $eventOk = false;
+        $ovkOk = false;
+
+        $this->checkDatabaseReadiness($chandlerOk, $ovkOk, $eventOk, $migrationsOk);
+
+        $res = -1;
+        if ($chandlerOk === null) {
+            $io->writeln("Chandler schema not detected, attempting to install...");
+
+            $res = $this->installChandler($input, $io);
+        } elseif ($chandlerOk === false) {
+            if ($input->getOption("repair")) {
+                $io->warning("Chandler schema detected but is broken, attempting to repair...");
+
+                $res = $this->installChandler($input, $io, true);
+            } else {
+                $io->writeln("Chandler schema detected but is broken");
+                $io->writeln("Run command with --repair to repair (PERMISSIONS WILL BE LOST)");
+
+                return 1;
+            }
+        }
+
+        if ($res > 0) {
+            return $res;
+        } elseif ($res == 0 && $oneShotMode) {
+            return 5;
+        }
+
+        if (!$ovkOk) {
+            $io->writeln("Initializing OpenVK schema...");
+            $res = $this->initSchema($io);
+            if ($res > 0) {
+                return $res;
+            } elseif ($oneShotMode) {
+                return 5;
+            }
+        }
+
+        if (!$migrationsOk) {
+            $io->writeln("Initializing upgrade log...");
+            $res = $this->initUpgradeLog($io);
+            if ($res > 0) {
+                return $res;
+            } elseif ($oneShotMode) {
+                return 5;
+            }
+        }
+
+        if ($eventOk !== false) {
+            if ($eventOk === null) {
+                $io->writeln("Initializing event database...");
+                $res = $this->initEventSchema($io);
+                if ($res > 0) {
+                    return $res;
+                } elseif ($oneShotMode) {
+                    return 5;
+                }
+            }
+
+            $io->writeln("Upgrading event database...");
+            $res = $this->runMigrations($io, true, $oneShotMode);
+            if ($res == 24) {
+                $output->writeln("Event database already up to date.");
+            } elseif ($res > 0) {
+                return $res;
+            }
+        }
+
+        $io->writeln("Upgrading database...");
+        $res = $this->runMigrations($io, false, $oneShotMode);
+
+        if (!$res) {
+            $io->success("Database has been upgraded!");
+
+            return 0;
+        } elseif ($res != 24) {
+            return $res;
+        }
+
+        $io->writeln("Database up to date. Nothing left to do.");
+
+        return 0;
+    }
+}
diff --git a/bootstrap.php b/bootstrap.php
index 42241ca4..21fdc65b 100644
--- a/bootstrap.php
+++ b/bootstrap.php
@@ -443,7 +443,10 @@ function downloadable_name(string $text): string
 }
 
 return (function () {
-    _ovk_check_environment();
+    if (php_sapi_name() != "cli") {
+        _ovk_check_environment();
+    }
+
     require __DIR__ . "/vendor/autoload.php";
 
     setlocale(LC_TIME, "POSIX");
diff --git a/install/init-migration-table.sql b/install/init-migration-table.sql
new file mode 100644
index 00000000..e26afcbb
--- /dev/null
+++ b/install/init-migration-table.sql
@@ -0,0 +1,15 @@
+START TRANSACTION;
+
+CREATE TABLE `ovk_upgrade_history` (
+    `level` smallint UNSIGNED NOT NULL,
+    `timestamp` bigint(20) UNSIGNED NOT NULL,
+    `operator` varchar(256) COLLATE utf8mb4_unicode_520_ci NOT NULL DEFAULT "Maintenance Script"
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_520_ci;
+
+CREATE TABLE `ovk_events_upgrade_history` (
+   `level` smallint UNSIGNED NOT NULL,
+   `timestamp` bigint(20) UNSIGNED NOT NULL,
+   `operator` varchar(256) COLLATE utf8mb4_unicode_520_ci NOT NULL DEFAULT "Maintenance Script"
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_520_ci;
+
+COMMIT;
\ No newline at end of file
diff --git a/install/sqls/00000-gifts.sql b/install/sqls/00000-gifts.sql
index 0ee54f14..59a5c46d 100644
--- a/install/sqls/00000-gifts.sql
+++ b/install/sqls/00000-gifts.sql
@@ -10,13 +10,10 @@ CREATE TABLE IF NOT EXISTS `coin_vouchers` (
   `deleted` tinyint(1) NOT NULL DEFAULT '0'
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
-DELIMITER $$
 CREATE TRIGGER `coinVoucherTokenAutoGen` BEFORE INSERT ON `coin_vouchers`
  FOR EACH ROW IF NEW.token IS NULL THEN
 	SET NEW.token = SUBSTRING(UPPER(REPLACE(UUID(), "-", "")), 1, 24);
-END IF
-$$
-DELIMITER ;
+END IF;
 
 CREATE TABLE IF NOT EXISTS `gifts` (
   `id` bigint(20) unsigned NOT NULL,
diff --git a/install/sqls/00026-toncoin-fetching.sql b/install/sqls/00026-toncoin-fetching.sql
index 6de0c925..d88381ff 100644
--- a/install/sqls/00026-toncoin-fetching.sql
+++ b/install/sqls/00026-toncoin-fetching.sql
@@ -1,6 +1,6 @@
 CREATE TABLE `cryptotransactions` (
   `id` bigint(20) NOT NULL AUTO_INCREMENT,
-  `hash` varchar(45) COLLATE utf8mb4_general_nopad_ci NOT NULL,
+  `hash` varchar(45) COLLATE utf8mb4_unicode_520_ci NOT NULL,
   `lt` bigint(20) NOT NULL,
   PRIMARY KEY (`id`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_nopad_ci;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_520_ci;
diff --git a/openvkctl b/openvkctl
index 1ed5f3be..005de9c8 100755
--- a/openvkctl
+++ b/openvkctl
@@ -12,6 +12,7 @@ $bootstrap = require(__DIR__ . "/../../../chandler/Bootstrap.php");
 $bootstrap->ignite(true);
 
 $application = new Application();
+$application->add(new CLI\UpgradeCommand());
 $application->add(new CLI\RebuildImagesCommand());
 $application->add(new CLI\FetchToncoinTransactions());
 
diff --git a/openvkctl.cmd b/openvkctl.cmd
new file mode 100644
index 00000000..926b63e8
--- /dev/null
+++ b/openvkctl.cmd
@@ -0,0 +1,2 @@
+@echo off
+php openvkctl %*
\ No newline at end of file