diff --git a/src/Laravel/Storage/SessionBag.php b/src/Laravel/Storage/SessionBag.php
index 39d02f14..5edfc57b 100644
--- a/src/Laravel/Storage/SessionBag.php
+++ b/src/Laravel/Storage/SessionBag.php
@@ -25,10 +25,26 @@ final readonly class SessionBag implements BagInterface
     {
         $session = $this->getSession();
 
-        /** @var Envelope[] $envelopes */
         $envelopes = $session->get(self::ENVELOPES_NAMESPACE, []);
 
-        return $envelopes;
+        if (!\is_array($envelopes)) {
+            return [];
+        }
+
+        $result = [];
+        foreach ($envelopes as $envelope) {
+            if ($envelope instanceof Envelope) {
+                $result[] = $envelope;
+            } elseif (\is_string($envelope)) {
+                $unserialized = @unserialize($envelope);
+                if ($unserialized instanceof Envelope) {
+                    $result[] = $unserialized;
+                }
+            }
+            // Arrays and invalid data silently skipped (graceful degradation)
+        }
+
+        return $result;
     }
 
     public function set(array $envelopes): void
@@ -41,7 +57,7 @@ final readonly class SessionBag implements BagInterface
             return;
         }
 
-        $session->put(self::ENVELOPES_NAMESPACE, $envelopes);
+        $session->put(self::ENVELOPES_NAMESPACE, array_map(serialize(...), $envelopes));
     }
 
     private function getSession(): Session|FallbackSessionInterface
diff --git a/tests/Laravel/Storage/SessionBagTest.php b/tests/Laravel/Storage/SessionBagTest.php
index 27757784..0625fe4c 100644
--- a/tests/Laravel/Storage/SessionBagTest.php
+++ b/tests/Laravel/Storage/SessionBagTest.php
@@ -9,6 +9,8 @@ use Flasher\Laravel\Storage\FallbackSessionInterface;
 use Flasher\Laravel\Storage\SessionBag;
 use Flasher\Prime\Notification\Envelope;
 use Flasher\Prime\Notification\Notification;
+use Flasher\Prime\Stamp\DelayStamp;
+use Flasher\Prime\Stamp\HopsStamp;
 use Flasher\Prime\Stamp\IdStamp;
 use Flasher\Tests\Laravel\TestCase;
 use Illuminate\Session\SessionManager;
@@ -65,7 +67,7 @@ final class SessionBagTest extends TestCase
         $sessionMock = \Mockery::mock(Store::class);
         $sessionMock->allows()->isStarted()->andReturns(true);
         $sessionMock->allows()->get(SessionBag::ENVELOPES_NAMESPACE, [])->andReturns($envelopes);
-        $sessionMock->expects()->put(SessionBag::ENVELOPES_NAMESPACE, $envelopes);
+        $sessionMock->expects()->put(SessionBag::ENVELOPES_NAMESPACE, array_map(serialize(...), $envelopes));
 
         $this->sessionManagerMock->allows()->driver()->andReturns($sessionMock);
 
@@ -193,4 +195,132 @@ final class SessionBagTest extends TestCase
 
         $this->assertSame($envelopes2, $this->sessionBag->get());
     }
+
+    public function testEnvelopeSurvivesJsonSerializationRoundTrip(): void
+    {
+        $notification = new Notification();
+        $notification->setType('success');
+        $notification->setMessage('Operation completed');
+
+        $original = new Envelope($notification, [
+            new IdStamp('json-test-id'),
+            new HopsStamp(2),
+            new DelayStamp(500),
+        ]);
+
+        $sessionMock = \Mockery::mock(Store::class);
+        $sessionMock->allows()->isStarted()->andReturns(true);
+
+        $captured = null;
+        $sessionMock->expects('put')->with(SessionBag::ENVELOPES_NAMESPACE, \Mockery::on(function ($value) use (&$captured) {
+            $captured = $value;
+
+            return true;
+        }));
+
+        $this->sessionManagerMock->allows()->driver()->andReturns($sessionMock);
+        $this->sessionBag->set([$original]);
+
+        $jsonEncoded = json_encode($captured, \JSON_THROW_ON_ERROR);
+        $jsonDecoded = json_decode($jsonEncoded, true, 512, \JSON_THROW_ON_ERROR);
+
+        $sessionMock->allows()->get(SessionBag::ENVELOPES_NAMESPACE, [])->andReturns($jsonDecoded);
+
+        $restored = $this->sessionBag->get();
+
+        $this->assertCount(1, $restored);
+        $this->assertInstanceOf(Envelope::class, $restored[0]);
+        $this->assertSame('success', $restored[0]->getType());
+        $this->assertSame('Operation completed', $restored[0]->getMessage());
+        $this->assertSame('json-test-id', $restored[0]->get(IdStamp::class)->getId());
+        $this->assertSame(2, $restored[0]->get(HopsStamp::class)->getAmount());
+        $this->assertSame(500, $restored[0]->get(DelayStamp::class)->getDelay());
+    }
+
+    public function testGetHandlesEnvelopeObjectsForBackwardCompatibility(): void
+    {
+        $envelopes = [
+            new Envelope(new Notification(), new IdStamp('legacy')),
+        ];
+
+        $envelopes[0]->setType('info');
+        $envelopes[0]->setMessage('Old session');
+
+        $sessionMock = \Mockery::mock(Store::class);
+        $sessionMock->expects()->isStarted()->andReturns(true);
+        $sessionMock->expects()->get(SessionBag::ENVELOPES_NAMESPACE, [])->andReturns($envelopes);
+
+        $this->sessionManagerMock->expects()->driver()->andReturns($sessionMock);
+
+        $result = $this->sessionBag->get();
+
+        $this->assertSame($envelopes, $result);
+    }
+
+    public function testGetSkipsCorruptedArrayData(): void
+    {
+        $sessionMock = \Mockery::mock(Store::class);
+        $sessionMock->expects()->isStarted()->andReturns(true);
+        $sessionMock->expects()->get(SessionBag::ENVELOPES_NAMESPACE, [])->andReturns([
+            ['title' => '', 'message' => '', 'type' => 'success', 'options' => [], 'metadata' => ['id' => 'corrupted']],
+        ]);
+
+        $this->sessionManagerMock->expects()->driver()->andReturns($sessionMock);
+
+        $result = $this->sessionBag->get();
+
+        $this->assertSame([], $result);
+    }
+
+    public function testGetSkipsInvalidSerializedStrings(): void
+    {
+        $sessionMock = \Mockery::mock(Store::class);
+        $sessionMock->expects()->isStarted()->andReturns(true);
+        $sessionMock->expects()->get(SessionBag::ENVELOPES_NAMESPACE, [])->andReturns([
+            'invalid-not-serialized-data',
+            'O:8:"stdClass":0:{}',  // Valid serialized object but wrong type
+            serialize(new Envelope(new Notification(), new IdStamp('valid'))),
+        ]);
+
+        $this->sessionManagerMock->expects()->driver()->andReturns($sessionMock);
+
+        $result = $this->sessionBag->get();
+
+        $this->assertCount(1, $result);
+        $this->assertInstanceOf(Envelope::class, $result[0]);
+        $this->assertSame('valid', $result[0]->get(IdStamp::class)->getId());
+    }
+
+    public function testPreservesAllStampsAcrossRoundTrip(): void
+    {
+        $notification = new Notification();
+        $notification->setType('warning');
+        $notification->setMessage('Multi-stamp');
+
+        $original = new Envelope($notification, [
+            new IdStamp('stamp-test'),
+            new HopsStamp(3),
+            new DelayStamp(1000),
+        ]);
+
+        $serialized = serialize($original);
+        $jsonEncoded = json_encode([$serialized], \JSON_THROW_ON_ERROR);
+        $jsonDecoded = json_decode($jsonEncoded, true, 512, \JSON_THROW_ON_ERROR);
+
+        $sessionMock = \Mockery::mock(Store::class);
+        $sessionMock->expects()->isStarted()->andReturns(true);
+        $sessionMock->expects()->get(SessionBag::ENVELOPES_NAMESPACE, [])->andReturns($jsonDecoded);
+
+        $this->sessionManagerMock->expects()->driver()->andReturns($sessionMock);
+
+        $restored = $this->sessionBag->get();
+
+        $this->assertCount(1, $restored);
+        $this->assertInstanceOf(Envelope::class, $restored[0]);
+        $this->assertSame('warning', $restored[0]->getType());
+        $this->assertSame('Multi-stamp', $restored[0]->getMessage());
+        $this->assertSame('stamp-test', $restored[0]->get(IdStamp::class)->getId());
+        $this->assertSame(3, $restored[0]->get(HopsStamp::class)->getAmount());
+        $this->assertSame(1000, $restored[0]->get(DelayStamp::class)->getDelay());
+    }
 }