diff --git a/src/Service/BrancherApp.php b/src/Service/BrancherApp.php
index 26ae7e9..1403186 100644
--- a/src/Service/BrancherApp.php
+++ b/src/Service/BrancherApp.php
@@ -60,13 +60,22 @@ public function create(string $app, ?array $data = null): string
      *
      * @param string $name Name of the Brancher node
      * @param array $data Data to be updated
+     * @param bool $appendLabels Whether to append labels or to overwrite
      * @return array Updated data
      * @throws HypernodeApiClientException
      * @throws HypernodeApiServerException
      */
-    public function update(string $name, array $data): array
+    public function update(string $name, array $data, bool $appendLabels = false): array
     {
         $url = sprintf(App::V2_BRANCHER_DETAIL_URL, $name);
+        
+        if ($appendLabels) {
+            $originHypernode = substr($name, 0, strrpos($name, '-'));
+            $existingLabels = $this->list($originHypernode)[0]['labels'] ?? [];
+            foreach (explode('&', http_build_query($existingLabels)) as $label) {
+                $data['labels'][] = $label;
+            }
+        }
 
         $response = $this->client->api->put($url, [], json_encode($data));
 
diff --git a/tests/unit/Service/BrancherAppTest.php b/tests/unit/Service/BrancherAppTest.php
index a7d8310..309d4ca 100644
--- a/tests/unit/Service/BrancherAppTest.php
+++ b/tests/unit/Service/BrancherAppTest.php
@@ -183,6 +183,46 @@ public function testUpdateBrancherApp()
         );
     }
 
+    public function testUpdateBrancherAppAppendsLabels()
+    {
+        $this->responses->append(
+            // List Brancher apps
+            new Response(200, [], json_encode([
+                'branchers' => [
+                    [
+                        'name' => 'johndoe-eph123456',
+                        'labels' => ['key1' => 'value1']
+                    ]
+                ]
+            ])),
+            // Update Brancher app
+            new Response(200, [], json_encode([
+                'labels' => [
+                    'key1' => 'value1',
+                    'key2' => 'value2',
+                ]
+            ])),
+        );
+
+        $result = $this->client->brancherApp->update(
+            'johndoe-eph123456', ['labels' => ['key2=value2']],
+            true
+        );
+
+        $request = $this->responses->getLastRequest();
+        $this->assertEquals('PUT', $request->getMethod());
+        $this->assertEquals('/v2/brancher/johndoe-eph123456/', $request->getUri());
+        $this->assertJson((string)$request->getBody());
+        $this->assertEquals(
+            ['labels' => ['key2=value2', 'key1=value1']],
+            json_decode((string)$request->getBody(), true)
+        );
+        $this->assertEquals(
+            ['labels' => [ 'key1' => 'value1', 'key2' => 'value2']],
+            $result
+        );
+    }
+
     public function testUpdateBrancherAppRaisesClientExceptions()
     {
         $badRequestResponse = new Response(400, [], json_encode([