diff --git a/src/GUID.php b/src/GUID.php
index 94d507b..02834f4 100644
--- a/src/GUID.php
+++ b/src/GUID.php
@@ -110,7 +110,7 @@ public function equals(GUIDInterface $guid): bool
 
     public function __toString(): string
     {
-        return $this->asHexString();
+        return $this->asBase64UrlString();
     }
 
     private static function getTimeBytes(int $nTimeBytes): string