Use legacy backend

jan-janssen · Aug 3, 2026 · Jul 26, 2026 · Jul 26, 2026 · Jul 26, 2026 · Jul 26, 2026
commit 49f26348257e120bb89e871b0d5c68f12b24ae38
diff --git a/pyproject.toml b/pyproject.toml
@@ -31,7 +31,7 @@ pyiron = [
     "pyiron_base>=0.11.10,<=0.15.12",
 ]
 pyiron_workflow = [
-    "pyiron_workflow>=0.13.0,<=0.15.5",
+    "pyiron_workflow>=0.13.0,<=0.18.0",
 ]
 executorlib = [
     "executorlib>=1.7.4,<=1.9.1",

diff --git a/src/python_workflow_definition/pyiron_workflow.py b/src/python_workflow_definition/pyiron_workflow.py
@@ -4,8 +4,8 @@
 from typing import Any
 
 import numpy as np
-from pyiron_workflow import Workflow, function_node
-from pyiron_workflow.api import Function
+from pyiron_workflow._legacy import Workflow, function_node
+from pyiron_workflow._legacy.api import Function
 
 from python_workflow_definition.models import PythonWorkflowDefinitionWorkflow
 from python_workflow_definition.shared import (

diff --git a/tests/test_pyiron_workflow.py b/tests/test_pyiron_workflow.py
@@ -2,7 +2,7 @@
 import os
 import sys
 import unittest
-from pyiron_workflow import Workflow, to_function_node
+from pyiron_workflow._legacy import Workflow, to_function_node
 from python_workflow_definition.pyiron_workflow import load_workflow_json, write_workflow_json
 
 function_str = """