---
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navsection: userguide
-title: CWL version and API support
+title: CWL version support
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Copyright (C) The Arvados Authors. All rights reserved.
SPDX-License-Identifier: CC-BY-SA-3.0
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+Arvados supports CWL v1.0, v1.1 and v1.2.
+
h2(#v12). Upgrading your workflows to CWL v1.2
If you are starting from a CWL v1.0 document, see "Upgrading your workflows to CWL v1.1":#v11 below.