diff --git a/composer.json b/composer.json
index f6f1727..bfc52eb 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
         "phpunit/phpunit": "^9.6.33",
         "shipmonk/coding-standard": "^0.2.0",
         "shipmonk/composer-dependency-analyser": "1.8.3",
-        "shipmonk/dead-code-detector": "^0.11.0",
+        "shipmonk/dead-code-detector": "^1.0",
         "shipmonk/name-collision-detector": "2.1.1",
         "shipmonk/phpstan-rules": "4.3.5"
     },
diff --git a/src/BaselineSplitter.php b/src/BaselineSplitter.php
index fa7ca84..c9c0a81 100644
--- a/src/BaselineSplitter.php
+++ b/src/BaselineSplitter.php
@@ -101,8 +101,6 @@ public function split(string $loaderFilePath): array
     /**
      * @param list<array{message: string, count: int, path: string, identifier: string|null}|array{rawMessage: string, count: int, path: string, identifier: string|null}> $errors
      * @return array<string, list<array{message: string, count: int, path: string}|array{rawMessage: string, count: int, path: string}>>
-     *
-     * @throws ErrorException
      */
     private function groupErrorsByIdentifier(
         array $errors,
@@ -122,15 +120,12 @@ private function groupErrorsByIdentifier(
                     'path' => $normalizedPath,
                 ];
 
-            } elseif (isset($error['message'])) {
+            } else {
                 $groupedErrors[$identifier][] = [
                     'message' => $error['message'],
                     'count' => $error['count'],
                     'path' => $normalizedPath,
                 ];
-
-            } else {
-                throw new ErrorException('Error is missing message or rawMessage');
             }
         }
 
diff --git a/src/Handler/PhpBaselineHandler.php b/src/Handler/PhpBaselineHandler.php
index 1573180..0a53691 100644
--- a/src/Handler/PhpBaselineHandler.php
+++ b/src/Handler/PhpBaselineHandler.php
@@ -51,7 +51,7 @@ public function encodeBaseline(
                 $message = $error['rawMessage'];
                 $messageKey = 'rawMessage';
             } else {
-                $message = $error['message']; // @phpstan-ignore offsetAccess.notFound
+                $message = $error['message'];
                 $messageKey = 'message';
             }