diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a248eb..230e2e9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,8 @@
 
 ## 1.1.1 under development
 
-- no changes in this release.
+- Chg #15: Remove `NullToStrictStringFuncCallArgRector` from `SetList::YII_CORE` skip list since it is never
+  registered by Rector (@vjik)
 
 ## 1.1.0 July 27, 2026
 
diff --git a/composer.json b/composer.json
index 502fee7..6a0e380 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
     "require": {
         "php": "^7.4 || ^8.0",
         "friendsofphp/php-cs-fixer": "^3.92.5",
-        "rector/rector": "^2.0"
+        "rector/rector": "^2.6.7"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.6.31",
diff --git a/src/Rector/sets/yii-core.php b/src/Rector/sets/yii-core.php
index 763f758..24d5e79 100644
--- a/src/Rector/sets/yii-core.php
+++ b/src/Rector/sets/yii-core.php
@@ -5,7 +5,6 @@
 use Rector\CodeQuality\Rector\Class_\InlineConstructorDefaultToPropertyRector;
 use Rector\Config\RectorConfig;
 use Rector\Php74\Rector\Closure\ClosureToArrowFunctionRector;
-use Rector\Php81\Rector\FuncCall\NullToStrictStringFuncCallArgRector;
 use Rector\Php81\Rector\Property\ReadOnlyPropertyRector;
 use Yiisoft\CodeStyle\Rector\Rules\RemoveOverrideAttributeRector;
 
@@ -18,6 +17,5 @@
     $rectorConfig->skip([
         ClosureToArrowFunctionRector::class,
         ReadOnlyPropertyRector::class,
-        NullToStrictStringFuncCallArgRector::class,
     ]);
 };