diff --git a/src/MetaData.php b/src/MetaData.php
index 05544b3..6699c00 100644
--- a/src/MetaData.php
+++ b/src/MetaData.php
@@ -41,7 +41,7 @@ final class MetaData
         '5.1' => ['8.1', '8.2'],
         '5.2' => ['8.1', '8.2', '8.3'],
         '5' => ['8.1', '8.2', '8.3'],
-        '6' => ['8.1', '8.2', '8.3'],
+        '6' => ['8.3'],
     ];
 
     /**