diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 285e24f..085685d 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -1,5 +1,5 @@
 parameters:
-	level: 6
+	level: 10
 	paths:
 		- src
 	tmpDir: build/phpstan
diff --git a/src/Command.php b/src/Command.php
index 9a14fb2..5251160 100644
--- a/src/Command.php
+++ b/src/Command.php
@@ -361,6 +361,9 @@ protected function validateDefinitions(array $definitions, array $values, string
                 continue;
             }
             $type = $definition['type'] ?? 'string';
+            if (!\is_string($type)) {
+                $type = 'string';
+            }
             if ($type === 'string' || !\is_string($value)) {
                 continue;
             }
diff --git a/src/Commands/Help.php b/src/Commands/Help.php
index b03b6ab..90493ee 100644
--- a/src/Commands/Help.php
+++ b/src/Commands/Help.php
@@ -106,8 +106,8 @@ protected function showCommand(string $commandName) : void
 
     protected function sortOptions(string $text) : string
     {
-        $text = \trim(\preg_replace('/\s+/', '', $text));
-        $text = \explode(',', $text);
+        $cleaned = \preg_replace('/\s+/', '', $text);
+        $text = \explode(',', \is_string($cleaned) ? $cleaned : '');
         \sort($text);
         return \implode(',', $text);
     }