diff --git a/composer.json b/composer.json
index ee028dae3..f57c419ea 100644
--- a/composer.json
+++ b/composer.json
@@ -142,7 +142,7 @@
         "phpunit/phpunit": "10.5.3",
         "ramsey/collection": "^1.2",
         "ramsey/uuid": "^4.2.3",
-        "rector/rector": "1.2.5",
+        "rector/rector": "1.2.6",
         "spiral/code-style": "^1.1",
         "spiral/nyholm-bridge": "^1.2",
         "spiral/testing": "^2.8",
diff --git a/tests/app/src/Interceptor/Append.php b/tests/app/src/Interceptor/Append.php
index 22266e8ff..1b393e9d3 100644
--- a/tests/app/src/Interceptor/Append.php
+++ b/tests/app/src/Interceptor/Append.php
@@ -9,7 +9,7 @@
 
 class Append implements CoreInterceptorInterface
 {
-    public function __construct(private string $string)
+    public function __construct(private readonly string $string)
     {
     }