diff --git a/docs/rector_rules_overview.md b/docs/rector_rules_overview.md
index ccfd7ec8541..2636e2bbb7f 100644
--- a/docs/rector_rules_overview.md
+++ b/docs/rector_rules_overview.md
@@ -1,4 +1,4 @@
-# All 515 Rectors Overview
+# All 518 Rectors Overview
 
 - [Projects](#projects)
 - [General](#general)
@@ -13,6 +13,7 @@
 - [CodeQuality](#codequality) (54)
 - [CodingStyle](#codingstyle) (34)
 - [DeadCode](#deadcode) (40)
+- [Decomplex](#decomplex) (1)
 - [Decouple](#decouple) (1)
 - [Doctrine](#doctrine) (16)
 - [DoctrineCodeQuality](#doctrinecodequality) (2)
@@ -24,6 +25,7 @@
 - [Laravel](#laravel) (6)
 - [Legacy](#legacy) (2)
 - [MagicDisclosure](#magicdisclosure) (5)
+- [MockeryToProphecy](#mockerytoprophecy) (1)
 - [MockistaToMockery](#mockistatomockery) (2)
 - [MysqlToMysqli](#mysqltomysqli) (4)
 - [Naming](#naming) (2)
@@ -62,7 +64,7 @@
 - [SOLID](#solid) (12)
 - [Sensio](#sensio) (3)
 - [StrictCodeQuality](#strictcodequality) (1)
-- [Symfony](#symfony) (29)
+- [Symfony](#symfony) (30)
 - [SymfonyCodeQuality](#symfonycodequality) (1)
 - [SymfonyPHPUnit](#symfonyphpunit) (1)
 - [Twig](#twig) (1)
@@ -3240,6 +3242,31 @@ Change ternary of bool : false to && bool
 
 <br><br>
 
+## Decomplex
+
+### `UseMessageVariableForSprintfInSymfonyStyleRector`
+
+- class: [`Rector\Decomplex\Rector\MethodCall\UseMessageVariableForSprintfInSymfonyStyleRector`](/../master/rules/decomplex/src/Rector/MethodCall/UseMessageVariableForSprintfInSymfonyStyleRector.php)
+- [test fixtures](/../master/rules/decomplex/tests/Rector/MethodCall/UseMessageVariableForSprintfInSymfonyStyleRector/Fixture)
+
+Decouple $message property from `sprintf()` calls in `$this->smyfonyStyle->method()`
+
+```diff
+ use Symfony\Component\Console\Style\SymfonyStyle;
+
+ final class SomeClass
+ {
+     public function run(SymfonyStyle $symfonyStyle)
+     {
+-        $symfonyStyle->info(sprintf('Hi %s', 'Tom'));
++        $message = sprintf('Hi %s', 'Tom');
++        $symfonyStyle->info($message);
+     }
+ }
+```
+
+<br><br>
+
 ## Decouple
 
 ### `DecoupleClassMethodToOwnClassRector`
@@ -4689,6 +4716,25 @@ services:
 
 <br><br>
 
+## MockeryToProphecy
+
+### `MockeryCreateMockToProphizeRector`
+
+- class: [`Rector\MockeryToProphecy\Rector\MethodCall\MockeryCreateMockToProphizeRector`](/../master/rules/mockery-to-prophecy/src/Rector/MethodCall/MockeryCreateMockToProphizeRector.php)
+
+Changes mockery mock creation to Prophesize
+
+```diff
+-$mock = \Mockery::mock(\'MyClass\');
++ $mock = $this->prophesize(\'MyClass\');
++
+ $service = new Service();
+-$service->injectDependency($mock);
++$service->injectDependency($mock->reveal());
+```
+
+<br><br>
+
 ## MockistaToMockery
 
 ### `MockeryTearDownRector`
@@ -10539,6 +10585,36 @@ Change "cascade_validation" option to specific node attribute
 
 <br><br>
 
+### `ChangeXmlToYamlFileLoaderInExtensionRector`
+
+- class: [`Rector\Symfony\Rector\Class_\ChangeXmlToYamlFileLoaderInExtensionRector`](/../master/rules/symfony/src/Rector/Class_/ChangeXmlToYamlFileLoaderInExtensionRector.php)
+- [test fixtures](/../master/rules/symfony/tests/Rector/Class_/ChangeXmlToYamlFileLoaderInExtensionRector/Fixture)
+
+Change XML loader to YAML in Bundle Extension
+
+```diff
+ use Symfony\Component\Config\FileLocator;
+ use Symfony\Component\DependencyInjection\ContainerBuilder;
+-use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
++use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+ use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+
+ final class SomeExtension extends Extension
+ {
+     public function load(array $configs, ContainerBuilder $container)
+     {
+-        $loader = new XmlFileLoader($container, new FileLocator());
+-        $loader->load(__DIR__ . '/../Resources/config/controller.xml');
+-        $loader->load(__DIR__ . '/../Resources/config/events.xml');
++        $loader = new YamlFileLoader($container, new FileLocator());
++        $loader->load(__DIR__ . '/../Resources/config/controller.yaml');
++        $loader->load(__DIR__ . '/../Resources/config/events.yaml');
+     }
+ }
+```
+
+<br><br>
+
 ### `ConsoleExceptionToErrorEventConstantRector`
 
 - class: [`Rector\Symfony\Rector\Console\ConsoleExceptionToErrorEventConstantRector`](/../master/rules/symfony/src/Rector/Console/ConsoleExceptionToErrorEventConstantRector.php)
diff --git a/rules/symfony/src/Rector/Class_/ChangeXmlToYamlFileLoaderInExtensionRector.php b/rules/symfony/src/Rector/Class_/ChangeXmlToYamlFileLoaderInExtensionRector.php
new file mode 100644
index 00000000000..1cd1417d1c7
--- /dev/null
+++ b/rules/symfony/src/Rector/Class_/ChangeXmlToYamlFileLoaderInExtensionRector.php
@@ -0,0 +1,141 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Symfony\Rector\Class_;
+
+use Nette\Utils\Strings;
+use PhpParser\Node;
+use PhpParser\Node\Expr\MethodCall;
+use PhpParser\Node\Expr\New_;
+use PhpParser\Node\Expr\Variable;
+use PhpParser\Node\Name\FullyQualified;
+use PhpParser\Node\Scalar\String_;
+use PhpParser\Node\Stmt\Class_;
+use Rector\Core\Rector\AbstractRector;
+use Rector\Core\RectorDefinition\CodeSample;
+use Rector\Core\RectorDefinition\RectorDefinition;
+
+/**
+ * @see \Rector\Symfony\Tests\Rector\Class_\ChangeXmlToYamlFileLoaderInExtensionRector\ChangeXmlToYamlFileLoaderInExtensionRectorTest
+ */
+final class ChangeXmlToYamlFileLoaderInExtensionRector extends AbstractRector
+{
+    public function getDefinition(): RectorDefinition
+    {
+        return new RectorDefinition('Change XML loader to YAML in Bundle Extension', [
+            new CodeSample(
+                <<<'PHP'
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+
+final class SomeExtension extends Extension
+{
+    public function load(array $configs, ContainerBuilder $container)
+    {
+        $loader = new XmlFileLoader($container, new FileLocator());
+        $loader->load(__DIR__ . '/../Resources/config/controller.xml');
+        $loader->load(__DIR__ . '/../Resources/config/events.xml');
+    }
+}
+PHP
+,
+                <<<'PHP'
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+
+final class SomeExtension extends Extension
+{
+    public function load(array $configs, ContainerBuilder $container)
+    {
+        $loader = new YamlFileLoader($container, new FileLocator());
+        $loader->load(__DIR__ . '/../Resources/config/controller.yaml');
+        $loader->load(__DIR__ . '/../Resources/config/events.yaml');
+    }
+}
+PHP
+
+            ),
+        ]);
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getNodeTypes(): array
+    {
+        return [Class_::class];
+    }
+
+    /**
+     * @param Class_ $node
+     */
+    public function refactor(Node $node): ?Node
+    {
+        if (! $this->isObjectType($node, 'Symfony\Component\HttpKernel\DependencyInjection\Extension')) {
+            return null;
+        }
+
+        $loadClassMethod = $node->getMethod('load');
+        if ($loadClassMethod === null) {
+            return null;
+        }
+
+        $this->traverseNodesWithCallable((array) $loadClassMethod->stmts, function (Node $node) {
+            if ($node instanceof New_) {
+                if (! $this->isName($node->class, 'Symfony\Component\DependencyInjection\Loader\XmlFileLoader')) {
+                    return null;
+                }
+
+                $node->class = new FullyQualified('Symfony\Component\DependencyInjection\Loader\YamlFileLoader');
+                return $node;
+            }
+
+            return $this->refactorLoadMethodCall($node);
+        });
+
+        return $node;
+    }
+
+    private function refactorLoadMethodCall(Node $node): ?Node
+    {
+        if (! $node instanceof MethodCall) {
+            return null;
+        }
+
+        if (! $node->var instanceof Variable) {
+            return null;
+        }
+
+        if (! $this->isObjectType($node->var, 'Symfony\Component\DependencyInjection\Loader\XmlFileLoader')) {
+            return null;
+        }
+
+        if (! $this->isName($node->name, 'load')) {
+            return null;
+        }
+
+        $this->replaceXmlWithYamlSuffix($node);
+        return $node;
+    }
+
+    private function replaceXmlWithYamlSuffix(MethodCall $methodCall): void
+    {
+        // replace XML to YAML suffix in string parts
+        $fileArgument = $methodCall->args[0]->value;
+
+        $this->traverseNodesWithCallable([$fileArgument], function (Node $node): ?Node {
+            if (! $node instanceof String_) {
+                return null;
+            }
+
+            $node->value = Strings::replace($node->value, '#\.xml$#', '.yaml');
+
+            return $node;
+        });
+    }
+}
diff --git a/rules/symfony/tests/Rector/Class_/ChangeXmlToYamlFileLoaderInExtensionRector/ChangeXmlToYamlFileLoaderInExtensionRectorTest.php b/rules/symfony/tests/Rector/Class_/ChangeXmlToYamlFileLoaderInExtensionRector/ChangeXmlToYamlFileLoaderInExtensionRectorTest.php
new file mode 100644
index 00000000000..879e54e9546
--- /dev/null
+++ b/rules/symfony/tests/Rector/Class_/ChangeXmlToYamlFileLoaderInExtensionRector/ChangeXmlToYamlFileLoaderInExtensionRectorTest.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Symfony\Tests\Rector\Class_\ChangeXmlToYamlFileLoaderInExtensionRector;
+
+use Iterator;
+use Rector\Core\Testing\PHPUnit\AbstractRectorTestCase;
+use Rector\Symfony\Rector\Class_\ChangeXmlToYamlFileLoaderInExtensionRector;
+use Symplify\SmartFileSystem\SmartFileInfo;
+
+final class ChangeXmlToYamlFileLoaderInExtensionRectorTest extends AbstractRectorTestCase
+{
+    /**
+     * @dataProvider provideData()
+     */
+    public function test(SmartFileInfo $fileInfo): void
+    {
+        $this->doTestFileInfo($fileInfo);
+    }
+
+    public function provideData(): Iterator
+    {
+        return $this->yieldFilesFromDirectory(__DIR__ . '/Fixture');
+    }
+
+    protected function getRectorClass(): string
+    {
+        return ChangeXmlToYamlFileLoaderInExtensionRector::class;
+    }
+}
diff --git a/rules/symfony/tests/Rector/Class_/ChangeXmlToYamlFileLoaderInExtensionRector/Fixture/fixture.php.inc b/rules/symfony/tests/Rector/Class_/ChangeXmlToYamlFileLoaderInExtensionRector/Fixture/fixture.php.inc
new file mode 100644
index 00000000000..9d8680cd848
--- /dev/null
+++ b/rules/symfony/tests/Rector/Class_/ChangeXmlToYamlFileLoaderInExtensionRector/Fixture/fixture.php.inc
@@ -0,0 +1,41 @@
+<?php
+
+namespace Rector\Symfony\Tests\Rector\Class_\ChangeXmlToYamlFileLoaderInExtensionRector\Fixture;
+
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+
+final class SomeExtension extends Extension
+{
+    public function load(array $configs, ContainerBuilder $container)
+    {
+        $loader = new XmlFileLoader($container, new FileLocator());
+        $loader->load(__DIR__ . '/../Resources/config/controller.xml');
+        $loader->load(__DIR__ . '/../Resources/config/events.xml');
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Symfony\Tests\Rector\Class_\ChangeXmlToYamlFileLoaderInExtensionRector\Fixture;
+
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+
+final class SomeExtension extends Extension
+{
+    public function load(array $configs, ContainerBuilder $container)
+    {
+        $loader = new \Symfony\Component\DependencyInjection\Loader\YamlFileLoader($container, new FileLocator());
+        $loader->load(__DIR__ . '/../Resources/config/controller.yaml');
+        $loader->load(__DIR__ . '/../Resources/config/events.yaml');
+    }
+}
+
+?>