diff --git a/src/Resources/Shipment.php b/src/Resources/Shipment.php
index 9fb4c6b..b38193b 100644
--- a/src/Resources/Shipment.php
+++ b/src/Resources/Shipment.php
@@ -6,7 +6,7 @@
 use Sendy\Api\ApiException;
 use Sendy\Api\Meta;
 
-class Shipment extends Resource
+final class Shipment extends Resource
 {
     /**
      * List all shipments
@@ -95,6 +95,20 @@ public function createFromPreference(array $data, bool $generateDirectly = true)
         return $this->connection->post("/shipments/preference", $data, ['generateDirectly' => $generateDirectly]);
     }
 
+    /**
+     * Create a shipment from a smart rule
+     *
+     * @param array<string, mixed|array<string,mixed>> $data
+     * @return array<string, mixed|array<string|mixed>>
+     * @throws ApiException
+     * @throws GuzzleException
+     * @see https://app.sendy.nl/api/docs#tag/Shipments/operation/shipments.smart-rule
+     */
+    public function createWithSmartRules(array $data): array
+    {
+        return $this->connection->post('/shipments/smart-rule', $data);
+    }
+
     /**
      * Generate a shipment
      *
diff --git a/tests/Resources/ShipmentTest.php b/tests/Resources/ShipmentTest.php
index 9258182..9a1d840 100644
--- a/tests/Resources/ShipmentTest.php
+++ b/tests/Resources/ShipmentTest.php
@@ -22,7 +22,7 @@ public function testList(): void
 
         $this->assertEquals([], $resource->list());
 
-        $this->assertEquals('/api/shipments?page=1', (string) $handler->getLastRequest()->getUri());
+        $this->assertEquals('/api/shipments?page=1', (string)$handler->getLastRequest()->getUri());
         $this->assertEquals('GET', $handler->getLastRequest()->getMethod());
     }
 
@@ -36,7 +36,7 @@ public function testGet(): void
 
         $this->assertEquals([], $resource->get('1337'));
 
-        $this->assertEquals('/api/shipments/1337', (string) $handler->getLastRequest()->getUri());
+        $this->assertEquals('/api/shipments/1337', (string)$handler->getLastRequest()->getUri());
         $this->assertEquals('GET', $handler->getLastRequest()->getMethod());
     }
 
@@ -50,7 +50,7 @@ public function testUpdate(): void
 
         $this->assertEquals([], $resource->update('1337', ['foo' => 'bar']));
 
-        $this->assertEquals('/api/shipments/1337', (string) $handler->getLastRequest()->getUri());
+        $this->assertEquals('/api/shipments/1337', (string)$handler->getLastRequest()->getUri());
         $this->assertEquals('PUT', $handler->getLastRequest()->getMethod());
         $this->assertEquals('{"foo":"bar"}', $handler->getLastRequest()->getBody()->getContents());
     }
@@ -65,7 +65,7 @@ public function testDelete(): void
 
         $this->assertEquals([], $resource->delete('1337'));
 
-        $this->assertEquals('/api/shipments/1337', (string) $handler->getLastRequest()->getUri());
+        $this->assertEquals('/api/shipments/1337', (string)$handler->getLastRequest()->getUri());
         $this->assertEquals('DELETE', $handler->getLastRequest()->getMethod());
     }
 
@@ -82,7 +82,7 @@ public function testCreateFromPreference(): void
 
         $this->assertEquals(
             '/api/shipments/preference?generateDirectly=0',
-            (string) $handler->getLastRequest()->getUri()
+            (string)$handler->getLastRequest()->getUri()
         );
         $this->assertEquals('POST', $handler->getLastRequest()->getMethod());
         $this->assertEquals('{"foo":"bar"}', $handler->getLastRequest()->getBody()->getContents());
@@ -90,10 +90,26 @@ public function testCreateFromPreference(): void
         $this->assertEquals([], $resource->createFromPreference(['foo' => 'bar']));
         $this->assertEquals(
             '/api/shipments/preference?generateDirectly=1',
-            (string) $handler->getLastRequest()->getUri()
+            (string)$handler->getLastRequest()->getUri()
         );
     }
 
+    public function testCreateWithSmartRules(): void
+    {
+        $handler = new MockHandler([
+            new Response(200, [], json_encode(['foo' => 'bar'])),
+        ]);
+
+        $resource = new Shipment($this->buildConnectionWithMockHandler($handler));
+
+        $resource->createWithSmartRules(['foo' => 'bar']);
+
+        $this->assertEquals('/api/shipments/smart-rule', (string)$handler->getLastRequest()->getUri());
+        $this->assertEquals('POST', $handler->getLastRequest()->getMethod());
+        $this->assertEquals('{"foo":"bar"}', $handler->getLastRequest()->getBody()->getContents());
+    }
+
+
     public function testGenerate(): void
     {
         $handler = new MockHandler([
@@ -105,13 +121,13 @@ public function testGenerate(): void
 
         $this->assertEquals([], $resource->generate('1337'));
 
-        $this->assertEquals('/api/shipments/1337/generate', (string) $handler->getLastRequest()->getUri());
+        $this->assertEquals('/api/shipments/1337/generate', (string)$handler->getLastRequest()->getUri());
         $this->assertEquals('POST', $handler->getLastRequest()->getMethod());
         $this->assertEquals('{"asynchronous":true}', $handler->getLastRequest()->getBody()->getContents());
 
         $this->assertEquals([], $resource->generate('1337', false));
 
-        $this->assertEquals('/api/shipments/1337/generate', (string) $handler->getLastRequest()->getUri());
+        $this->assertEquals('/api/shipments/1337/generate', (string)$handler->getLastRequest()->getUri());
         $this->assertEquals('{"asynchronous":false}', $handler->getLastRequest()->getBody()->getContents());
     }
 
@@ -125,7 +141,7 @@ public function testLabels(): void
 
         $this->assertEquals([], $resource->labels('1337'));
 
-        $this->assertEquals('/api/shipments/1337/labels', (string) $handler->getLastRequest()->getUri());
+        $this->assertEquals('/api/shipments/1337/labels', (string)$handler->getLastRequest()->getUri());
         $this->assertEquals('GET', $handler->getLastRequest()->getMethod());
     }
 
@@ -139,7 +155,7 @@ public function testDocuments(): void
 
         $this->assertEquals([], $resource->documents('1337'));
 
-        $this->assertEquals('/api/shipments/1337/documents', (string) $handler->getLastRequest()->getUri());
+        $this->assertEquals('/api/shipments/1337/documents', (string)$handler->getLastRequest()->getUri());
         $this->assertEquals('GET', $handler->getLastRequest()->getMethod());
     }
 }