diff --git a/config/services.yaml b/config/services.yaml
index d3db831..d0ef403 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -24,5 +24,7 @@ services:
       - { name: kernel.event_subscriber }
 
   Macpaw\SchemaContextBundle\Messenger\Middleware\BaggageSchemaMiddleware:
+    arguments:
+      $sendersLocator: '@messenger.senders_locator'
     tags:
       - { name: messenger.middleware }
diff --git a/src/Messenger/Middleware/BaggageSchemaMiddleware.php b/src/Messenger/Middleware/BaggageSchemaMiddleware.php
index 04d7e7a..91f6523 100644
--- a/src/Messenger/Middleware/BaggageSchemaMiddleware.php
+++ b/src/Messenger/Middleware/BaggageSchemaMiddleware.php
@@ -11,10 +11,13 @@
 use Symfony\Component\Messenger\Middleware\MiddlewareInterface;
 use Symfony\Component\Messenger\Middleware\StackInterface;
 use Symfony\Component\Messenger\Stamp\ReceivedStamp;
+use Symfony\Component\Messenger\Transport\Sender\SendersLocatorInterface;
+use Symfony\Component\Messenger\Transport\Sync\SyncTransport;
 
 class BaggageSchemaMiddleware implements MiddlewareInterface
 {
     public function __construct(
+        private SendersLocatorInterface $sendersLocator,
         private BaggageSchemaResolver $baggageSchemaResolver,
         private BaggageCodec $baggageCodec,
     ) {
@@ -24,7 +27,7 @@ public function handle(Envelope $envelope, StackInterface $stack): Envelope
     {
         $stamp = $envelope->last(BaggageSchemaStamp::class);
 
-        if ($envelope->last(ReceivedStamp::class)) {
+        if ($this->isWorker($envelope) && !$this->isSyncTransport($envelope)) {
             if ($stamp instanceof BaggageSchemaStamp) {
                 $this->baggageSchemaResolver
                     ->setSchema($stamp->schema)
@@ -47,4 +50,20 @@ public function handle(Envelope $envelope, StackInterface $stack): Envelope
 
         return $stack->next()->handle($envelope, $stack);
     }
+
+    private function isWorker(Envelope $envelope): bool
+    {
+        return (bool) $envelope->last(ReceivedStamp::class);
+    }
+
+    private function isSyncTransport(Envelope $envelope): bool
+    {
+        foreach ($this->sendersLocator->getSenders($envelope) as $sender) {
+            if ($sender instanceof SyncTransport) {
+                return true;
+            }
+        }
+
+        return false;
+    }
 }
diff --git a/tests/Messenger/Middleware/BaggageSchemaMiddlewareTest.php b/tests/Messenger/Middleware/BaggageSchemaMiddlewareTest.php
index 92744e4..bccd3d6 100644
--- a/tests/Messenger/Middleware/BaggageSchemaMiddlewareTest.php
+++ b/tests/Messenger/Middleware/BaggageSchemaMiddlewareTest.php
@@ -13,6 +13,7 @@
 use Symfony\Component\Messenger\Middleware\MiddlewareInterface;
 use Symfony\Component\Messenger\Middleware\StackInterface;
 use Symfony\Component\Messenger\Stamp\ReceivedStamp;
+use Symfony\Component\Messenger\Transport\Sender\SendersLocatorInterface;
 
 class BaggageSchemaMiddlewareTest extends TestCase
 {
@@ -28,9 +29,10 @@ public function testSchemaIsSetFromStamp(): void
             'X-Schema' => 'tenant1',
         ];
 
+        $sendersLocator = $this->createMock(SendersLocatorInterface::class);
         $resolver = new BaggageSchemaResolver($environmentSchema, $environmentName, $schemaOverridableEnvironments);
         $baggageCodec = new BaggageCodec();
-        $middleware = new BaggageSchemaMiddleware($resolver, $baggageCodec);
+        $middleware = new BaggageSchemaMiddleware($sendersLocator, $resolver, $baggageCodec);
         $stamp = new BaggageSchemaStamp($schema, $rawBaggage);
         $envelope = (new Envelope(new \stdClass()))->with($stamp);
         $envelope = $envelope->with(new ReceivedStamp('async'));
@@ -73,12 +75,14 @@ public function testSchemaStampIsInjectedIfMissing(): void
         $baggage = [
             'X-Schema' => 'tenant1',
         ];
+
+        $sendersLocator = $this->createMock(SendersLocatorInterface::class);
         $resolver = new BaggageSchemaResolver($environmentSchema, $environmentName, $schemaOverridableEnvironments);
         $resolver
             ->setSchema($schema)
             ->setBaggage($baggage);
         $baggageCodec = new BaggageCodec();
-        $middleware = new BaggageSchemaMiddleware($resolver, $baggageCodec);
+        $middleware = new BaggageSchemaMiddleware($sendersLocator, $resolver, $baggageCodec);
         $originalEnvelope = new Envelope(new \stdClass());
         $stack = $this->createMock(StackInterface::class);
 
@@ -108,9 +112,10 @@ public function testSchemaStampIsDefaultSchema(): void
         $environmentName = 'dev';
         $schemaOverridableEnvironments = ['dev', 'test'];
 
+        $sendersLocator = $this->createMock(SendersLocatorInterface::class);
         $resolver = new BaggageSchemaResolver($environmentSchema, $environmentName, $schemaOverridableEnvironments);
         $baggageCodec = new BaggageCodec();
-        $middleware = new BaggageSchemaMiddleware($resolver, $baggageCodec);
+        $middleware = new BaggageSchemaMiddleware($sendersLocator, $resolver, $baggageCodec);
         $originalEnvelope = new Envelope(new \stdClass());
         $stack = $this->createMock(StackInterface::class);