diff --git a/pyproject.toml b/pyproject.toml
index e62f545..3295a51 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ classifiers = [
 ]
 
 dependencies = [
-    "cadquery-ocp-novtk >= 7.9.2.0.dev0, < 8.0",
+    "cadquery-ocp-novtk >= 7.9, < 8.0",
     "typing_extensions >= 4.6.0, < 5",
     "numpy >= 2, < 3",
     "svgpathtools >= 1.5.1, < 2",
diff --git a/src/build123d/vtk_tools.py b/src/build123d/vtk_tools.py
index cd12867..eef5b33 100644
--- a/src/build123d/vtk_tools.py
+++ b/src/build123d/vtk_tools.py
@@ -44,7 +44,7 @@ license:
 
 """
 
-from typing import Any, Union
+from typing import Any
 import warnings
 
 from build123d.topology import Shape
@@ -117,7 +117,7 @@ def to_vtk_poly_data(
     tolerance: float | None = None,
     angular_tolerance: float | None = None,
     normals: bool = False,
-) -> Union["vtkPolyData", None]:
+) -> "vtkPolyData" | None:
     """Convert shape to vtkPolyData
 
     Args: