diff --git a/.github/workflows/github-actions.yml b/.github/workflows/github-actions.yml
index 859a3a0..86f17c3 100644
--- a/.github/workflows/github-actions.yml
+++ b/.github/workflows/github-actions.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: [ '7.3', '7.4', '8.0' ]
+        php: [ '7.3', '7.4', '8.0',  '8.1' ]
     steps:
       - uses: actions/checkout@v2
       - name: Setup PHP with tools
diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
index a9a9d32..675c435 100644
--- a/.php-cs-fixer.dist.php
+++ b/.php-cs-fixer.dist.php
@@ -42,7 +42,7 @@
     'constant_case' => true,
     'lowercase_keywords' => true,
     'class_attributes_separation' => ['elements' => ['method' => 'one']],
-    'native_function_invocation' => ['include' => ['@compiler_optimized']],
+    'native_function_invocation' => ['include' => ['@compiler_optimized', 'sprintf']],
     'no_alias_functions' => true,
     'no_closing_tag' => true,
     'no_extra_blank_lines' => [
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 037eb24..07d35f7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,12 @@ CHANGELOG
 
 master
 ------
+* Add support of PHP 8.1
+* force usage of native sprintf function
+* add php cs fixer rule native_function_invocation on sprintf
 
+v1.1.0
+------
 * Added rule to ban shell execution via backticks
 * Added rule to ban print statements
 * Allow Composer plugin ergebnis/composer-normalize
diff --git a/composer.json b/composer.json
index 85dfab5..182098d 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     ],
     "homepage": "https://github.com/ekino/phpstan-banned-code",
     "require": {
-        "php": "^7.3 || ^8.0",
+        "php": "^7.3 || ^8.0 || ^8.1",
         "phpstan/phpstan": "^1.0"
     },
     "require-dev": {
diff --git a/src/Rules/BannedNodesRule.php b/src/Rules/BannedNodesRule.php
index 07fae1a..47aeea3 100644
--- a/src/Rules/BannedNodesRule.php
+++ b/src/Rules/BannedNodesRule.php
@@ -71,13 +71,13 @@ public function processNode(Node $node, Scope $scope): array
             $function = $node->name->toString();
 
             if (\in_array($function, $this->bannedFunctions)) {
-                return [sprintf('Should not use function "%s", please change the code.', $function)];
+                return [\sprintf('Should not use function "%s", please change the code.', $function)];
             }
 
             return [];
         }
 
-        return [sprintf('Should not use node with type "%s", please change the code.', $type)];
+        return [\sprintf('Should not use node with type "%s", please change the code.', $type)];
     }
 
     /**
diff --git a/src/Rules/BannedUseTestRule.php b/src/Rules/BannedUseTestRule.php
index 2cc2253..865da36 100644
--- a/src/Rules/BannedUseTestRule.php
+++ b/src/Rules/BannedUseTestRule.php
@@ -62,14 +62,14 @@ public function processNode(Node $node, Scope $scope): array
         }
 
         if (!$node instanceof Use_) {
-            throw new \InvalidArgumentException(sprintf('$node must be an instance of %s, %s given', Use_::class, \get_class($node)));
+            throw new \InvalidArgumentException(\sprintf('$node must be an instance of %s, %s given', Use_::class, \get_class($node)));
         }
 
         $errors = [];
 
         foreach ($node->uses as $use) {
             if (preg_match('#^Tests#', $use->name->toString())) {
-                $errors[] = sprintf('Should not use %s in the non-test file %s', $use->name->toString(), $scope->getFile());
+                $errors[] = \sprintf('Should not use %s in the non-test file %s', $use->name->toString(), $scope->getFile());
             }
         }