diff --git a/src/PreTokenizers/WhitespaceSplit.php b/src/PreTokenizers/WhitespaceSplit.php
index d8087d4..a3e8f0f 100644
--- a/src/PreTokenizers/WhitespaceSplit.php
+++ b/src/PreTokenizers/WhitespaceSplit.php
@@ -14,6 +14,8 @@ public function __construct(protected array $config)
 
     public function preTokenizeText(string|array $text, array $options): array
     {
-        return explode(' ', $text);
+        preg_match_all('/\S+/', $text, $matches);
+
+        return $matches[0] ?? [];
     }
 }
\ No newline at end of file