diff --git a/src/lib/Actors/ActorConfig.php b/src/lib/Actors/ActorConfig.php
index 4b4e961..29552dd 100644
--- a/src/lib/Actors/ActorConfig.php
+++ b/src/lib/Actors/ActorConfig.php
@@ -35,7 +35,9 @@ public function __construct(
         protected DateInterval|null $idle_timeout = null,
         protected DateInterval|null $scan_interval = null,
         protected DateInterval|null $drain_timeout = null,
-        protected bool|null $drain_enabled = null
+        protected bool|null $drain_enabled = null,
+        protected ReentrantConfig|null $reentrantConfig = null,
+        protected int|null $remindersStoragePartitions = null
     ) {
     }
 
@@ -49,7 +51,9 @@ public function __construct(
      */
     public function get_actor_type_from_dapr_type(string $dapr_type): string|null
     {
-        if($this->actor_name_to_type[$dapr_type] ?? false) return $this->actor_name_to_type[$dapr_type];
+        if ($this->actor_name_to_type[$dapr_type] ?? false) {
+            return $this->actor_name_to_type[$dapr_type];
+        }
 
         $actors = array_combine($this->get_supported_actors(), $this->actor_name_to_type);
 
@@ -106,31 +110,34 @@ public function drain_enabled(): bool|null
     }
 
     #[ArrayShape([
-        'entities'                => "",
-        'drainRebalancedActors'   => "",
+        'entities' => "",
+        'drainRebalancedActors' => "",
         'drainOngoingCallTimeout' => "mixed",
-        'actorScanInterval'       => "mixed",
-        'actorIdleTimeout'        => "mixed",
+        'actorScanInterval' => "mixed",
+        'actorIdleTimeout' => "mixed",
     ])] public function serialize(
         mixed $value,
         ISerializer $serializer
     ): array {
-        $return = [
-            'entities' => $value->get_supported_actors(),
-        ];
-        if ($a = $value->get_idle_timeout()) {
-            $return['actorIdleTimeout'] = Formats::normalize_interval($a);
-        }
-        if ($a = $value->get_scan_interval()) {
-            $return['actorScanInterval'] = Formats::normalize_interval($a);
-        }
-        if ($a = $value->get_drain_timeout()) {
-            $return['drainOngoingCallTimeout'] = Formats::normalize_interval($a);
-        }
-        if ($a = $value->drain_enabled()) {
-            $return['drainRebalancedActors'] = $a;
-        }
-
-        return $return;
+        return array_merge(
+            [
+                'entities' => $this->get_supported_actors(),
+            ],
+            $this->idle_timeout ? ['actorIdleTimeout' => Formats::normalize_interval($this->idle_timeout)] : [],
+            $this->scan_interval ? ['actorScanInterval' => Formats::normalize_interval($this->scan_interval)] : [],
+            $this->drain_timeout ? [
+                'drainOngoingCallTimeout' => Formats::normalize_interval(
+                    $this->drain_timeout
+                )
+            ] : [],
+            $this->drain_enabled ? ['drainRebalancedActors' => $this->drain_enabled] : [],
+            $this->reentrantConfig ? [
+                'reentrancy' => array_merge(
+                    ['enabled' => true],
+                    $this->reentrantConfig->max_stack_depth ? ['maxStackDepth' => $this->reentrantConfig->max_stack_depth] : []
+                )
+            ] : [],
+            $this->remindersStoragePartitions === null ? [] : ['remindersStoragePartitions' => $this->remindersStoragePartitions],
+        );
     }
 }
diff --git a/src/lib/Actors/ReentrantConfig.php b/src/lib/Actors/ReentrantConfig.php
new file mode 100644
index 0000000..69a8e67
--- /dev/null
+++ b/src/lib/Actors/ReentrantConfig.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace Dapr\Actors;
+
+/**
+ * Class ReentrantConfig
+ * @package Dapr\Actors
+ */
+class ReentrantConfig
+{
+    public function __construct(public int|null $max_stack_depth = null)
+    {
+    }
+}
diff --git a/src/lib/Client/DaprHttpClient.php b/src/lib/Client/DaprHttpClient.php
index 42a64c1..6b95993 100644
--- a/src/lib/Client/DaprHttpClient.php
+++ b/src/lib/Client/DaprHttpClient.php
@@ -3,6 +3,7 @@
 namespace Dapr\Client;
 
 use Dapr\Deserialization\IDeserializer;
+use Dapr\Middleware\Defaults\ActorToken;
 use Dapr\Serialization\ISerializer;
 use GuzzleHttp\Client;
 use Psr\Log\LoggerInterface;
@@ -47,6 +48,10 @@ public function __construct(
             $options['headers']['dapr-api-token'] = $this->getDaprToken();
         }
 
+        if (!empty(ActorToken::$token)) {
+            $options['headers']['Dapr-Reentrancy-Id'] = &ActorToken::$token;
+        }
+
         $this->httpClient = new Client($options);
     }
 
diff --git a/src/lib/Middleware/Defaults/ActorToken.php b/src/lib/Middleware/Defaults/ActorToken.php
new file mode 100644
index 0000000..bd64c31
--- /dev/null
+++ b/src/lib/Middleware/Defaults/ActorToken.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace Dapr\Middleware\Defaults;
+
+use Dapr\Middleware\IRequestMiddleware;
+use Dapr\Middleware\IResponseMiddleware;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Class ActorToken
+ * @package Dapr\Middleware\Defaults
+ */
+class ActorToken implements IRequestMiddleware, IResponseMiddleware
+{
+    // this is intentionally left undefined in order to throw if the client is created before detecting a reentrant token
+    public static array $token;
+
+    public function request(RequestInterface $request): RequestInterface
+    {
+        if ($request->hasHeader('Dapr-Reentrancy-Id')) {
+            self::$token = $request->getHeader('Dapr-Reentrancy-Id');
+        } else {
+            self::$token = [];
+        }
+
+        return $request;
+    }
+
+    public function response(ResponseInterface $response): ResponseInterface
+    {
+        if (!empty(self::$token)) {
+            return $response->withHeader('Dapr-Reentrancy-Id', self::$token);
+        }
+
+        return $response;
+    }
+}
diff --git a/tests/ActorConfigTest.php b/tests/ActorConfigTest.php
index 26a32a6..8e6c511 100644
--- a/tests/ActorConfigTest.php
+++ b/tests/ActorConfigTest.php
@@ -4,7 +4,7 @@
 use Dapr\Serialization\ISerializer;
 use Fixtures\ITestActor;
 
-require_once __DIR__.'/DaprTests.php';
+require_once __DIR__ . '/DaprTests.php';
 
 /**
  * Class ActorConfigTest
@@ -14,7 +14,7 @@ class ActorConfigTest extends DaprTests
     public function testSerialization()
     {
         $serializer = $this->container->get(ISerializer::class);
-        $config     = new ActorConfig(
+        $config = new ActorConfig(
             [ITestActor::class],
             new DateInterval('PT1S'),
             new DateInterval('PT2S'),
@@ -23,11 +23,32 @@ public function testSerialization()
         );
         $this->assertSame(
             [
-                'entities'                => ['TestActor'],
-                'actorIdleTimeout'        => '0h0m1s0us',
-                'actorScanInterval'       => '0h0m2s0us',
+                'entities' => ['TestActor'],
+                'actorIdleTimeout' => '0h0m1s0us',
+                'actorScanInterval' => '0h0m2s0us',
                 'drainOngoingCallTimeout' => '0h0m3s0us',
-                'drainRebalancedActors'   => true,
+                'drainRebalancedActors' => true,
+            ],
+            $serializer->as_array($config)
+        );
+    }
+
+    public function testReentrancy()
+    {
+        $serializer = $this->container->get(ISerializer::class);
+        $config = new ActorConfig(
+            [ITestActor::class],
+            reentrantConfig: new \Dapr\Actors\ReentrantConfig(12),
+            remindersStoragePartitions: 1
+        );
+        $this->assertSame(
+            [
+                'entities' => ['TestActor'],
+                'reentrancy' => [
+                    'enabled' => true,
+                    'maxStackDepth' => 12
+                ],
+                'remindersStoragePartitions' => 1
             ],
             $serializer->as_array($config)
         );