diff --git a/rocrate/model/computerlanguage.py b/rocrate/model/computerlanguage.py
index 014bdc0..718e23d 100644
--- a/rocrate/model/computerlanguage.py
+++ b/rocrate/model/computerlanguage.py
@@ -77,7 +77,7 @@ def cwl(crate, version=None):
     id_ = "https://w3id.org/workflowhub/workflow-ro-crate#cwl"
     identifier = "https://w3id.org/cwl/"
     if version:
-        identifier = f"{identifier}v{version}/"
+        identifier = f"{identifier}v{version.lstrip('v')}/"
     properties = {
         "name": "Common Workflow Language",
         "alternateName": "CWL",
diff --git a/test/test_workflow_ro_crate.py b/test/test_workflow_ro_crate.py
index 6deed65..08f5e7b 100644
--- a/test/test_workflow_ro_crate.py
+++ b/test/test_workflow_ro_crate.py
@@ -127,7 +127,7 @@ def test_create_wf_include(test_data_dir, tmpdir, helpers):
         assert f1.read() == f2.read()
 
 
-@pytest.mark.parametrize("lang_version", [None, "1.2"])
+@pytest.mark.parametrize("lang_version", [None, "1.2", "v1.2"])
 def test_cwl_lang_version(test_data_dir, lang_version):
     wf_id = 'sample_cwl_wf.cwl'
     wf_path = test_data_dir / wf_id
@@ -138,6 +138,9 @@ def test_cwl_lang_version(test_data_dir, lang_version):
     if lang_version is None:
         assert lang_id == "https://w3id.org/cwl/"
         assert "version" not in lang
-    else:
+    elif lang_version == "1.2":
         assert lang_id == "https://w3id.org/cwl/v1.2/"
         assert lang["version"] == "1.2"
+    else:
+        assert lang_id == "https://w3id.org/cwl/v1.2/"
+        assert lang["version"] == "v1.2"