diff --git a/composer.json b/composer.json
index cae9b1c..99c1f74 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     "ext-json": "*",
     "ext-sockets": "*",
     "doctrine/collections": "^2.1",
-    "doctrine/dbal": "^3.8",
+    "doctrine/dbal": "^4.0",
     "psr/log": "^3.0",
     "psr/simple-cache": "^3.0",
     "symfony/event-dispatcher": "^6.0|^7.0"
@@ -26,7 +26,7 @@
     "kubawerlos/php-cs-fixer-custom-fixers": "^3.19",
     "monolog/monolog": "^3.5",
     "phpstan/phpstan": "^1.10",
-    "phpunit/phpunit": "^10.5",
+    "phpunit/phpunit": "^11.0",
     "symplify/easy-coding-standard": "^12.1"
   },
   "license": "MIT",
diff --git a/src/MySQLReplication/BinLog/BinLogSocketConnect.php b/src/MySQLReplication/BinLog/BinLogSocketConnect.php
index 9b097b9..7755f38 100644
--- a/src/MySQLReplication/BinLog/BinLogSocketConnect.php
+++ b/src/MySQLReplication/BinLog/BinLogSocketConnect.php
@@ -192,9 +192,14 @@ private function getBinlogStream(): void
             $this->executeSQL('SET @master_binlog_checksum = @@global.binlog_checksum');
         }
 
+
         if ($this->config->heartbeatPeriod > 0.00) {
             // master_heartbeat_period is in nanoseconds
-            $this->executeSQL('SET @master_heartbeat_period = ' . $this->config->heartbeatPeriod * 1000000000);
+            if (version_compare($this->repository->getVersion(), '8.4.0') >= 0) {
+                $this->executeSQL('SET @source_heartbeat_period = ' . $this->config->heartbeatPeriod * 1000000000);
+            } else {
+                $this->executeSQL('SET @master_heartbeat_period = ' . $this->config->heartbeatPeriod * 1000000000);
+            }
 
             $this->logger->debug('Heartbeat period set to ' . $this->config->heartbeatPeriod . ' seconds');
         }
diff --git a/src/MySQLReplication/BinaryDataReader/BinaryDataReader.php b/src/MySQLReplication/BinaryDataReader/BinaryDataReader.php
index 3a8119f..a709767 100644
--- a/src/MySQLReplication/BinaryDataReader/BinaryDataReader.php
+++ b/src/MySQLReplication/BinaryDataReader/BinaryDataReader.php
@@ -286,7 +286,7 @@ public function readDouble(): float
 
     public function readTableId(): string
     {
-        return $this->unpackUInt64($this->read(self::UNSIGNED_INT48_LENGTH) . chr(0) . chr(0));
+        return (string)$this->unpackUInt64($this->read(self::UNSIGNED_INT48_LENGTH) . chr(0) . chr(0));
     }
 
     public function isComplete(int $size): bool
diff --git a/src/MySQLReplication/Config/Config.php b/src/MySQLReplication/Config/Config.php
index 8542531..916f434 100644
--- a/src/MySQLReplication/Config/Config.php
+++ b/src/MySQLReplication/Config/Config.php
@@ -106,7 +106,7 @@ public function validate(): void
     public function checkDataBasesOnly(string $database): bool
     {
         return ($this->databasesOnly !== [] && !in_array($database, $this->databasesOnly, true))
-            || ($this->databasesRegex !== []  && !self::matchNames($database, $this->databasesRegex));
+            || ($this->databasesRegex !== [] && !self::matchNames($database, $this->databasesRegex));
     }
 
 
@@ -116,17 +116,6 @@ public function checkTablesOnly(string $table): bool
             || ($this->tablesRegex !== [] && !self::matchNames($table, $this->tablesRegex));
     }
 
-    private static function matchNames(string $name, array $patterns): bool
-    {
-        foreach ($patterns as $pattern) {
-            if (preg_match($pattern, $name)) {
-                return true;
-            }
-        }
-
-        return false;
-    }
-
     public function checkEvent(int $type): bool
     {
         if ($this->eventsOnly !== [] && !in_array($type, $this->eventsOnly, true)) {
@@ -144,4 +133,15 @@ public function jsonSerialize(): array
     {
         return get_class_vars(self::class);
     }
+
+    private static function matchNames(string $name, array $patterns): bool
+    {
+        foreach ($patterns as $pattern) {
+            if (preg_match($pattern, $name)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
 }
diff --git a/src/MySQLReplication/Event/RotateEvent.php b/src/MySQLReplication/Event/RotateEvent.php
index 0e0d2b9..58f3118 100644
--- a/src/MySQLReplication/Event/RotateEvent.php
+++ b/src/MySQLReplication/Event/RotateEvent.php
@@ -13,7 +13,7 @@ class RotateEvent extends EventCommon
 {
     public function makeRotateEventDTO(): RotateDTO
     {
-        $binFilePos = $this->binaryDataReader->readUInt64();
+        $binFilePos = (string)$this->binaryDataReader->readUInt64();
         $binFileName = $this->binaryDataReader->read(
             $this->eventInfo->getSizeNoHeader() - $this->getSizeToRemoveByVersion()
         );
diff --git a/src/MySQLReplication/Event/RowEvent/RowEvent.php b/src/MySQLReplication/Event/RowEvent/RowEvent.php
index e2f27ee..d5cbf77 100644
--- a/src/MySQLReplication/Event/RowEvent/RowEvent.php
+++ b/src/MySQLReplication/Event/RowEvent/RowEvent.php
@@ -416,7 +416,7 @@ public function makeUpdateRowsDTO(): ?UpdateRowsDTO
 
     protected function findTableMap(): ?TableMap
     {
-        $tableId = $this->binaryDataReader->readTableId();
+        $tableId = (string)$this->binaryDataReader->readTableId();
         $this->binaryDataReader->advance(2);
 
         if (in_array(
diff --git a/src/MySQLReplication/Event/XidEvent.php b/src/MySQLReplication/Event/XidEvent.php
index 39611fa..a59f981 100644
--- a/src/MySQLReplication/Event/XidEvent.php
+++ b/src/MySQLReplication/Event/XidEvent.php
@@ -13,6 +13,6 @@ class XidEvent extends EventCommon
 {
     public function makeXidDTO(): XidDTO
     {
-        return new XidDTO($this->eventInfo, $this->binaryDataReader->readUInt64());
+        return new XidDTO($this->eventInfo, (string)$this->binaryDataReader->readUInt64());
     }
 }
diff --git a/src/MySQLReplication/Repository/MySQLRepository.php b/src/MySQLReplication/Repository/MySQLRepository.php
index 19cfdf6..b38c994 100644
--- a/src/MySQLReplication/Repository/MySQLRepository.php
+++ b/src/MySQLReplication/Repository/MySQLRepository.php
@@ -37,8 +37,8 @@ public function getFields(string $database, string $table): FieldDTOCollection
                     `TABLE_SCHEMA` = ?
                 AND
                     `TABLE_NAME` = ?
-            ORDER BY 
-                ORDINAL_POSITION        
+            ORDER BY
+                ORDINAL_POSITION
        ';
 
         return FieldDTOCollection::makeFromArray(
@@ -57,15 +57,10 @@ public function isCheckSum(): bool
 
     public function getVersion(): string
     {
-        $r = '';
-        $versions = $this->getConnection()
-            ->fetchAllAssociative('SHOW VARIABLES LIKE "version%"');
-
-        foreach ($versions as $version) {
-            $r .= $version['Value'];
-        }
+        $res = $this->getConnection()
+            ->fetchAssociative('SHOW VARIABLES LIKE "version"');
 
-        return $r;
+        return $res['Value'] ?? '';
     }
 
     public function getMasterStatus(): MasterStatusDTO
@@ -100,11 +95,8 @@ public function ping(Connection $connection): bool
 
     private function getConnection(): Connection
     {
-        if ($this->ping($this->connection) === false) {
-            $this->connection->close();
-            $this->connection->connect();
-        }
-
+        // In DBAL 4.x, connections handle reconnection automatically
+        // No need for manual ping/reconnect logic
         return $this->connection;
     }
 }
diff --git a/tests/Unit/Repository/MySQLRepositoryTest.php b/tests/Unit/Repository/MySQLRepositoryTest.php
index 5ad88ac..1a9d9da 100644
--- a/tests/Unit/Repository/MySQLRepositoryTest.php
+++ b/tests/Unit/Repository/MySQLRepositoryTest.php
@@ -8,6 +8,7 @@
 
 use Doctrine\DBAL\Connection;
 use Doctrine\DBAL\Exception;
+use Doctrine\DBAL\Exception\ConnectionException;
 use Doctrine\DBAL\Platforms\MySQLPlatform;
 use MySQLReplication\Repository\FieldDTOCollection;
 use MySQLReplication\Repository\MasterStatusDTO;
@@ -71,21 +72,13 @@ public function testShouldIsCheckSum(): void
     public function testShouldGetVersion(): void
     {
         $expected = [
-            [
-                'Value' => 'foo',
-            ],
-            [
-                'Value' => 'bar',
-            ],
-            [
-                'Value' => '123',
-            ],
+            'Value' => 'version',
         ];
 
-        $this->connection->method('fetchAllAssociative')
-            ->willReturn($expected);
+        $this->connection->method('fetchAssociative')
+              ->willReturn($expected);
 
-        self::assertEquals('foobar123', $this->mySQLRepositoryTest->getVersion());
+        self::assertEquals('version', $this->mySQLRepositoryTest->getVersion());
     }
 
     public function testShouldGetMasterStatus(): void
@@ -104,13 +97,17 @@ public function testShouldGetMasterStatus(): void
         self::assertEquals(MasterStatusDTO::makeFromArray($expected), $this->mySQLRepositoryTest->getMasterStatus());
     }
 
-    public function testShouldReconnect(): void
+            public function testShouldReconnect(): void
     {
         // just to cover private getConnection
+        $exception = $this->createMock(ConnectionException::class);
+
         $this->connection->method('executeQuery')
-            ->willReturnCallback(static function () {
-                throw new Exception('');
-            });
+            ->willThrowException($exception);
+
+        $this->connection->method('fetchAssociative')
+            ->willReturn(['Value' => 'NONE']);
+
         $this->mySQLRepositoryTest->isCheckSum();
         self::assertTrue(true);
     }