diff --git a/composer.json b/composer.json
index 2a002989c21..c65c03b959d 100644
--- a/composer.json
+++ b/composer.json
@@ -38,7 +38,7 @@
     "require-dev": {
         "doctrine/coding-standard": "^12.0",
         "phpbench/phpbench": "^1.0",
-        "phpstan/phpstan": "1.10.35",
+        "phpstan/phpstan": "1.10.59",
         "phpunit/phpunit": "^10.4.0",
         "psr/log": "^1 || ^2 || ^3",
         "squizlabs/php_codesniffer": "3.7.2",
diff --git a/phpstan.neon b/phpstan.neon
index 93e3875d269..4ea0a3630a2 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -30,7 +30,7 @@ parameters:
             message: '~^Result of method Doctrine\\DBAL\\Connection::commit\(\) \(void\) is used\.$~'
             path: src/UnitOfWork.php
         -
-            message: '~^Strict comparison using === between void and false will always evaluate to false\.$~'
+            message: '~^Strict comparison using === between null and false will always evaluate to false\.$~'
             path: src/UnitOfWork.php
         -
             message: '~^Variable \$e on left side of \?\? always exists and is not nullable\.$~'
diff --git a/src/Mapping/DefaultTypedFieldMapper.php b/src/Mapping/DefaultTypedFieldMapper.php
index e83cc9ea47c..49144b8b7c8 100644
--- a/src/Mapping/DefaultTypedFieldMapper.php
+++ b/src/Mapping/DefaultTypedFieldMapper.php
@@ -4,6 +4,7 @@
 
 namespace Doctrine\ORM\Mapping;
 
+use BackedEnum;
 use DateInterval;
 use DateTime;
 use DateTimeImmutable;
@@ -16,6 +17,7 @@
 use function array_merge;
 use function assert;
 use function enum_exists;
+use function is_a;
 
 /** @psalm-type ScalarName = 'array'|'bool'|'float'|'int'|'string' */
 final class DefaultTypedFieldMapper implements TypedFieldMapper
@@ -52,18 +54,18 @@ public function validateAndComplete(array $mapping, ReflectionProperty $field):
             && ($type instanceof ReflectionNamedType)
         ) {
             if (! $type->isBuiltin() && enum_exists($type->getName())) {
-                $mapping['enumType'] = $type->getName();
-
                 $reflection = new ReflectionEnum($type->getName());
                 if (! $reflection->isBacked()) {
                     throw MappingException::backedEnumTypeRequired(
                         $field->class,
                         $mapping['fieldName'],
-                        $mapping['enumType'],
+                        $type->getName(),
                     );
                 }
 
-                $type = $reflection->getBackingType();
+                assert(is_a($type->getName(), BackedEnum::class, true));
+                $mapping['enumType'] = $type->getName();
+                $type                = $reflection->getBackingType();
 
                 assert($type instanceof ReflectionNamedType);
             }