diff --git a/composer.json b/composer.json
index 3b89e70..0c115d7 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
 	],
 	"require": {
 		"php": "^7.2 || ^8.0",
-		"phpstan/phpstan": "^1.9.3"
+		"phpstan/phpstan": "^1.10"
 	},
 	"require-dev": {
 		"php-parallel-lint/php-parallel-lint": "^1.2",
diff --git a/src/Rules/Deprecations/AccessDeprecatedPropertyRule.php b/src/Rules/Deprecations/AccessDeprecatedPropertyRule.php
index e8abc19..3e1f88b 100644
--- a/src/Rules/Deprecations/AccessDeprecatedPropertyRule.php
+++ b/src/Rules/Deprecations/AccessDeprecatedPropertyRule.php
@@ -10,7 +10,6 @@
 use PHPStan\Reflection\MissingPropertyFromReflectionException;
 use PHPStan\Reflection\ReflectionProvider;
 use PHPStan\Rules\Rule;
-use PHPStan\Type\TypeUtils;
 use function sprintf;
 
 /**
@@ -44,7 +43,7 @@ public function processNode(Node $node, Scope $scope): array
 
 		$propertyName = $node->name->name;
 		$propertyAccessedOnType = $scope->getType($node->var);
-		$referencedClasses = TypeUtils::getDirectClassNames($propertyAccessedOnType);
+		$referencedClasses = $propertyAccessedOnType->getObjectClassNames();
 
 		foreach ($referencedClasses as $referencedClass) {
 			try {
diff --git a/src/Rules/Deprecations/CallToDeprecatedMethodRule.php b/src/Rules/Deprecations/CallToDeprecatedMethodRule.php
index 53e023f..6ec4e0c 100644
--- a/src/Rules/Deprecations/CallToDeprecatedMethodRule.php
+++ b/src/Rules/Deprecations/CallToDeprecatedMethodRule.php
@@ -10,7 +10,6 @@
 use PHPStan\Reflection\MissingMethodFromReflectionException;
 use PHPStan\Reflection\ReflectionProvider;
 use PHPStan\Rules\Rule;
-use PHPStan\Type\TypeUtils;
 use function sprintf;
 
 /**
@@ -44,7 +43,7 @@ public function processNode(Node $node, Scope $scope): array
 
 		$methodName = $node->name->name;
 		$methodCalledOnType = $scope->getType($node->var);
-		$referencedClasses = TypeUtils::getDirectClassNames($methodCalledOnType);
+		$referencedClasses = $methodCalledOnType->getObjectClassNames();
 
 		foreach ($referencedClasses as $referencedClass) {
 			try {