diff --git a/.github/workflows/db.50.2204.yml b/.github/workflows/db.50.2204.yml
index 226e1a4..27fd7d7 100644
--- a/.github/workflows/db.50.2204.yml
+++ b/.github/workflows/db.50.2204.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        neo4j-version: ['5.4', '5.6', '5.8', '5.12', '5.13']
+        neo4j-version: ['5.4', '5.6', '5.8', '5.12', '5.13', '5.23']
         php-version: ['8.1', '8.2', '8.3']
 
     services:
diff --git a/src/protocol/V5_6.php b/src/protocol/V5_6.php
new file mode 100644
index 0000000..399a48c
--- /dev/null
+++ b/src/protocol/V5_6.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace Bolt\protocol;
+
+/**
+ * Class Protocol version 5.4
+ *
+ * @author Michal Stefanak
+ * @link https://github.com/neo4j-php/Bolt
+ * @see https://www.neo4j.com/docs/bolt/current/bolt/message/
+ * @package Bolt\protocol
+ */
+class V5_6 extends AProtocol
+{
+    use \Bolt\protocol\v5\AvailableStructures;
+    use \Bolt\protocol\v5_1\ServerStateTransition;
+
+    use \Bolt\protocol\v1\ResetMessage;
+
+    use \Bolt\protocol\v3\RunMessage;
+    use \Bolt\protocol\v3\BeginMessage;
+    use \Bolt\protocol\v3\CommitMessage;
+    use \Bolt\protocol\v3\RollbackMessage;
+    use \Bolt\protocol\v3\GoodbyeMessage;
+
+    use \Bolt\protocol\v4\PullMessage;
+    use \Bolt\protocol\v4\DiscardMessage;
+
+    use \Bolt\protocol\v4_4\RouteMessage;
+
+    use \Bolt\protocol\v5_1\LogonMessage;
+    use \Bolt\protocol\v5_1\LogoffMessage;
+
+    use \Bolt\protocol\v5_3\HelloMessage;
+
+    use \Bolt\protocol\v5_4\TelemetryMessage;
+}
diff --git a/src/protocol/v1/ResetMessage.php b/src/protocol/v1/ResetMessage.php
index f465a05..bd9da91 100644
--- a/src/protocol/v1/ResetMessage.php
+++ b/src/protocol/v1/ResetMessage.php
@@ -3,7 +3,7 @@
 namespace Bolt\protocol\v1;
 
 use Bolt\enum\Message;
-use Bolt\protocol\{V1, V2, V3, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4};
+use Bolt\protocol\{V1, V2, V3, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4, V5_6};
 use Bolt\error\BoltException;
 
 trait ResetMessage
@@ -15,7 +15,7 @@ trait ResetMessage
      * @link https://www.neo4j.com/docs/bolt/current/bolt/message/#messages-reset
      * @throws BoltException
      */
-    public function reset(): V1|V2|V3|V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4
+    public function reset(): V1|V2|V3|V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4|V5_6
     {
         $this->write($this->packer->pack(0x0F));
         $this->pipelinedMessages[] = Message::RESET;
diff --git a/src/protocol/v3/BeginMessage.php b/src/protocol/v3/BeginMessage.php
index 487f6d3..4aad596 100644
--- a/src/protocol/v3/BeginMessage.php
+++ b/src/protocol/v3/BeginMessage.php
@@ -3,7 +3,7 @@
 namespace Bolt\protocol\v3;
 
 use Bolt\enum\Message;
-use Bolt\protocol\{V3, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4};
+use Bolt\protocol\{V3, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4, V5_6};
 use Bolt\error\BoltException;
 
 trait BeginMessage
@@ -15,7 +15,7 @@ trait BeginMessage
      * @link https://www.neo4j.com/docs/bolt/current/bolt/message/#messages-begin
      * @throws BoltException
      */
-    public function begin(array $extra = []): V3|V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4
+    public function begin(array $extra = []): V3|V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4|V5_6
     {
         $this->write($this->packer->pack(0x11, (object)$extra));
         $this->pipelinedMessages[] = Message::BEGIN;
diff --git a/src/protocol/v3/CommitMessage.php b/src/protocol/v3/CommitMessage.php
index cece762..b024269 100644
--- a/src/protocol/v3/CommitMessage.php
+++ b/src/protocol/v3/CommitMessage.php
@@ -3,7 +3,7 @@
 namespace Bolt\protocol\v3;
 
 use Bolt\enum\Message;
-use Bolt\protocol\{Response, V3, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4};
+use Bolt\protocol\{Response, V3, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4, V5_6};
 use Bolt\error\BoltException;
 
 trait CommitMessage
@@ -15,7 +15,7 @@ trait CommitMessage
      * @link https://www.neo4j.com/docs/bolt/current/bolt/message/#messages-commit
      * @throws BoltException
      */
-    public function commit(): V3|V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4
+    public function commit(): V3|V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4|V5_6
     {
         $this->write($this->packer->pack(0x12));
         $this->pipelinedMessages[] = Message::COMMIT;
diff --git a/src/protocol/v3/RollbackMessage.php b/src/protocol/v3/RollbackMessage.php
index fa67d54..b8da7dd 100644
--- a/src/protocol/v3/RollbackMessage.php
+++ b/src/protocol/v3/RollbackMessage.php
@@ -3,7 +3,7 @@
 namespace Bolt\protocol\v3;
 
 use Bolt\enum\Message;
-use Bolt\protocol\{Response, V3, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4};
+use Bolt\protocol\{Response, V3, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4, V5_6};
 use Bolt\error\BoltException;
 
 trait RollbackMessage
@@ -15,7 +15,7 @@ trait RollbackMessage
      * @link https://www.neo4j.com/docs/bolt/current/bolt/message/#messages-rollback
      * @throws BoltException
      */
-    public function rollback(): V3|V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4
+    public function rollback(): V3|V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4|V5_6
     {
         $this->write($this->packer->pack(0x13));
         $this->pipelinedMessages[] = Message::ROLLBACK;
diff --git a/src/protocol/v3/RunMessage.php b/src/protocol/v3/RunMessage.php
index 52b73d8..6e03ab2 100644
--- a/src/protocol/v3/RunMessage.php
+++ b/src/protocol/v3/RunMessage.php
@@ -3,7 +3,7 @@
 namespace Bolt\protocol\v3;
 
 use Bolt\enum\Message;
-use Bolt\protocol\{Response, V3, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4};
+use Bolt\protocol\{Response, V3, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4, V5_6};
 use Bolt\error\BoltException;
 
 trait RunMessage
@@ -15,7 +15,7 @@ trait RunMessage
      * @link https://www.neo4j.com/docs/bolt/current/bolt/message/#messages-run
      * @throws BoltException
      */
-    public function run(string $query, array $parameters = [], array $extra = []): V3|V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4
+    public function run(string $query, array $parameters = [], array $extra = []): V3|V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4|V5_6
     {
         $this->write($this->packer->pack(
             0x10,
diff --git a/src/protocol/v4/DiscardMessage.php b/src/protocol/v4/DiscardMessage.php
index fdce66c..9102fdb 100644
--- a/src/protocol/v4/DiscardMessage.php
+++ b/src/protocol/v4/DiscardMessage.php
@@ -4,7 +4,7 @@
 
 use Bolt\enum\Message;
 use Bolt\enum\Signature;
-use Bolt\protocol\{Response, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4};
+use Bolt\protocol\{Response, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4, V5_6};
 use Bolt\error\BoltException;
 
 trait DiscardMessage
@@ -17,7 +17,7 @@ trait DiscardMessage
      * @param array $extra [n::Integer, qid::Integer]
      * @throws BoltException
      */
-    public function discard(array $extra = []): V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4
+    public function discard(array $extra = []): V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4|V5_6
     {
         if (!array_key_exists('n', $extra))
             $extra['n'] = -1;
diff --git a/src/protocol/v4/PullMessage.php b/src/protocol/v4/PullMessage.php
index 39aa70d..4559d94 100644
--- a/src/protocol/v4/PullMessage.php
+++ b/src/protocol/v4/PullMessage.php
@@ -3,7 +3,7 @@
 namespace Bolt\protocol\v4;
 
 use Bolt\enum\{Message, Signature};
-use Bolt\protocol\{Response, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4};
+use Bolt\protocol\{Response, V4, V4_1, V4_2, V4_3, V4_4, V5, V5_1, V5_2, V5_3, V5_4, V5_6};
 use Bolt\error\BoltException;
 
 trait PullMessage
@@ -16,7 +16,7 @@ trait PullMessage
      * @param array $extra [n::Integer, qid::Integer]
      * @throws BoltException
      */
-    public function pull(array $extra = []): V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4
+    public function pull(array $extra = []): V4|V4_1|V4_2|V4_3|V4_4|V5|V5_1|V5_2|V5_3|V5_4|V5_6
     {
         if (!array_key_exists('n', $extra))
             $extra['n'] = -1;
diff --git a/src/protocol/v4_4/RouteMessage.php b/src/protocol/v4_4/RouteMessage.php
index 3078232..43f7901 100644
--- a/src/protocol/v4_4/RouteMessage.php
+++ b/src/protocol/v4_4/RouteMessage.php
@@ -3,7 +3,7 @@
 namespace Bolt\protocol\v4_4;
 
 use Bolt\enum\Message;
-use Bolt\protocol\{V4_4, V5, V5_1, V5_2, V5_3, V5_4};
+use Bolt\protocol\{V4_4, V5, V5_1, V5_2, V5_3, V5_4, V5_6};
 use Bolt\error\BoltException;
 
 trait RouteMessage
@@ -16,7 +16,7 @@ trait RouteMessage
      * @param array $extra [db::String, imp_user::String]
      * @throws BoltException
      */
-    public function route(array $routing, array $bookmarks = [], array $extra = []): V4_4|V5|V5_1|V5_2|V5_3|V5_4
+    public function route(array $routing, array $bookmarks = [], array $extra = []): V4_4|V5|V5_1|V5_2|V5_3|V5_4|V5_6
     {
         $this->write($this->packer->pack(0x66, (object)$routing, $bookmarks, (object)$extra));
         $this->pipelinedMessages[] = Message::ROUTE;
diff --git a/src/protocol/v5_1/HelloMessage.php b/src/protocol/v5_1/HelloMessage.php
index 06a2649..231ab35 100644
--- a/src/protocol/v5_1/HelloMessage.php
+++ b/src/protocol/v5_1/HelloMessage.php
@@ -3,7 +3,7 @@
 namespace Bolt\protocol\v5_1;
 
 use Bolt\enum\Message;
-use Bolt\protocol\{V5_1, V5_2, V5_3, V5_4};
+use Bolt\protocol\{V5_1, V5_2, V5_3, V5_4, V5_6};
 use Bolt\error\BoltException;
 
 trait HelloMessage
@@ -15,7 +15,7 @@ trait HelloMessage
      * @link https://www.neo4j.com/docs/bolt/current/bolt/message/#messages-hello
      * @throws BoltException
      */
-    public function hello(array $extra = []): V5_1|V5_2|V5_3|V5_4
+    public function hello(array $extra = []): V5_1|V5_2|V5_3|V5_4|V5_6
     {
         if (empty($extra['user_agent']))
             $extra['user_agent'] = 'bolt-php';
diff --git a/src/protocol/v5_1/LogoffMessage.php b/src/protocol/v5_1/LogoffMessage.php
index 7c43ba8..f7869f9 100644
--- a/src/protocol/v5_1/LogoffMessage.php
+++ b/src/protocol/v5_1/LogoffMessage.php
@@ -4,7 +4,7 @@
 
 use Bolt\enum\Message;
 use Bolt\error\BoltException;
-use Bolt\protocol\{V5_1, V5_2, V5_3, V5_4};
+use Bolt\protocol\{V5_1, V5_2, V5_3, V5_4, V5_6};
 
 trait LogoffMessage
 {
@@ -15,7 +15,7 @@ trait LogoffMessage
      * @link https://www.neo4j.com/docs/bolt/current/bolt/message/#messages-logoff
      * @throws BoltException
      */
-    public function logoff(): V5_1|V5_2|V5_3|V5_4
+    public function logoff(): V5_1|V5_2|V5_3|V5_4|V5_6
     {
         $this->write($this->packer->pack(0x6B));
         $this->pipelinedMessages[] = Message::LOGOFF;
diff --git a/src/protocol/v5_1/LogonMessage.php b/src/protocol/v5_1/LogonMessage.php
index 1b5d85a..a2fca5c 100644
--- a/src/protocol/v5_1/LogonMessage.php
+++ b/src/protocol/v5_1/LogonMessage.php
@@ -4,7 +4,7 @@
 
 use Bolt\enum\Message;
 use Bolt\error\BoltException;
-use Bolt\protocol\{V5_1, V5_2, V5_3, V5_4};
+use Bolt\protocol\{V5_1, V5_2, V5_3, V5_4, V5_6};
 
 trait LogonMessage
 {
@@ -15,7 +15,7 @@ trait LogonMessage
      * @link https://www.neo4j.com/docs/bolt/current/bolt/message/#messages-logon
      * @throws BoltException
      */
-    public function logon(array $auth): V5_1|V5_2|V5_3|V5_4
+    public function logon(array $auth): V5_1|V5_2|V5_3|V5_4|V5_6
     {
         $this->write($this->packer->pack(0x6A, (object)$auth));
         $this->pipelinedMessages[] = Message::LOGON;
diff --git a/src/protocol/v5_3/HelloMessage.php b/src/protocol/v5_3/HelloMessage.php
index fc9d26a..ce7444d 100644
--- a/src/protocol/v5_3/HelloMessage.php
+++ b/src/protocol/v5_3/HelloMessage.php
@@ -2,7 +2,7 @@
 
 namespace Bolt\protocol\v5_3;
 
-use Bolt\protocol\{V5_1, V5_2, V5_3, V5_4};
+use Bolt\protocol\{V5_1, V5_2, V5_3, V5_4, V5_6};
 use Bolt\error\BoltException;
 
 trait HelloMessage
@@ -19,7 +19,7 @@ trait HelloMessage
      * @param array $extra Use \Bolt\helpers\Auth to generate appropiate array
      * @throws BoltException
      */
-    public function hello(array $extra = []): V5_1|V5_2|V5_3|V5_4
+    public function hello(array $extra = []): V5_1|V5_2|V5_3|V5_4|V5_6
     {
         $extra['bolt_agent'] = [
             'product' => 'php-bolt/' . \Composer\InstalledVersions::getPrettyVersion('stefanak-michal/bolt'),
diff --git a/src/protocol/v5_4/TelemetryMessage.php b/src/protocol/v5_4/TelemetryMessage.php
index ace38cc..563b416 100644
--- a/src/protocol/v5_4/TelemetryMessage.php
+++ b/src/protocol/v5_4/TelemetryMessage.php
@@ -2,7 +2,7 @@
 
 namespace Bolt\protocol\v5_4;
 
-use Bolt\protocol\V5_4;
+use Bolt\protocol\{V5_4, V5_6};
 use Bolt\enum\Message;
 use Bolt\error\BoltException;
 
@@ -15,7 +15,7 @@ trait TelemetryMessage
      * @link https://neo4j.com/docs/bolt/current/bolt/message/#messages-telemetry
      * @throws BoltException
      */
-    public function telemetry(int $api): V5_4
+    public function telemetry(int $api): V5_4|V5_6
     {
         $this->write($this->packer->pack(0x54, $api));
         $this->pipelinedMessages[] = Message::TELEMETRY;
diff --git a/tests/TestLayer.php b/tests/TestLayer.php
index 63e0bf2..76d1a65 100644
--- a/tests/TestLayer.php
+++ b/tests/TestLayer.php
@@ -75,6 +75,8 @@ protected function getCompatibleBoltVersion(string $url = null): float|int
 
         $neo4jVersion = $decoded['neo4j_version'];
 
+        if (version_compare($neo4jVersion, '5.23', '>='))
+            return 5.6;
         if (version_compare($neo4jVersion, '5.13', '>='))
             return 5.4;
         if (version_compare($neo4jVersion, '5.9', '>='))
diff --git a/tests/protocol/V5_6Test.php b/tests/protocol/V5_6Test.php
new file mode 100644
index 0000000..6a891cc
--- /dev/null
+++ b/tests/protocol/V5_6Test.php
@@ -0,0 +1,20 @@
+<?php
+
+use Bolt\protocol\V5_6;
+
+/**
+ * Class V5_6Test
+ *
+ * @author Michal Stefanak
+ * @link https://github.com/neo4j-php/Bolt
+ * @package Bolt\tests\protocol
+ */
+class V5_6Test extends \Bolt\tests\protocol\ProtocolLayer
+{
+    public function test__construct(): V5_6
+    {
+        $cls = new V5_6(1, $this->mockConnection());
+        $this->assertInstanceOf(V5_6::class, $cls);
+        return $cls;
+    }
+}