diff --git a/requirements/requirements_docs.txt b/requirements/requirements_docs.txt
index 8951320166..8862d27296 100644
--- a/requirements/requirements_docs.txt
+++ b/requirements/requirements_docs.txt
@@ -7,7 +7,7 @@ jupyter_sphinx==0.5.3
 nbsphinx==0.9.5
 pypandoc==1.15
 pytest-sphinx==0.6.3
-pyvista==0.45.3
+pyvista==0.46.0
 sphinx==8.2.3
 sphinx-copybutton==0.5.2
 sphinx-gallery==0.19.0
diff --git a/requirements/requirements_test.txt b/requirements/requirements_test.txt
index cb5690c2d7..36b7ce04de 100644
--- a/requirements/requirements_test.txt
+++ b/requirements/requirements_test.txt
@@ -8,5 +8,5 @@ pytest==8.4.1
 pytest-cov==6.2.1
 pytest-order==1.3.0
 pytest-rerunfailures==15.0
-pyvista==0.45.3
+pyvista==0.46.0
 vtk==9.4.2
diff --git a/src/ansys/dpf/core/helpers/utils.py b/src/ansys/dpf/core/helpers/utils.py
index 55ae77300b..5d9c31562c 100644
--- a/src/ansys/dpf/core/helpers/utils.py
+++ b/src/ansys/dpf/core/helpers/utils.py
@@ -34,7 +34,7 @@ def _sort_supported_kwargs(bound_method, **kwargs):
 
         warnings.simplefilter("ignore")
     # Get supported arguments
-    supported_args = inspect.getfullargspec(bound_method).args
+    supported_args = inspect.signature(bound_method).parameters.keys()
     kwargs_in = {}
     kwargs_not_avail = {}
     # Filter the given arguments
diff --git a/src/ansys/dpf/core/vtk_helper.py b/src/ansys/dpf/core/vtk_helper.py
index d40913f5dc..c75c27190d 100644
--- a/src/ansys/dpf/core/vtk_helper.py
+++ b/src/ansys/dpf/core/vtk_helper.py
@@ -185,12 +185,18 @@ def dpf_mesh_to_vtk_op(mesh, nodes=None, as_linear=True):
     celltypes_pv = mesh_to_pyvista.outputs.cell_types()
     if VTK9:
         grid = pv.UnstructuredGrid(cells_pv, celltypes_pv, nodes_pv)
-        setattr(grid, "_dpf_cache_op", [cells_pv, celltypes_pv, nodes_pv])
+        # setattr(grid, "_dpf_cache_op", [cells_pv, celltypes_pv, nodes_pv])
+        pv.set_new_attribute(
+            obj=grid, name="_dpf_cache_op", value=[cells_pv, celltypes_pv, nodes_pv]
+        )
         return grid
     else:
         offsets_pv = mesh_to_pyvista.outputs.offsets()
         grid = pv.UnstructuredGrid(offsets_pv, cells_pv, celltypes_pv, nodes_pv)
-        setattr(grid, "_dpf_cache_op", [cells_pv, celltypes_pv, nodes_pv, offsets_pv])
+        # setattr(grid, "_dpf_cache_op", [cells_pv, celltypes_pv, nodes_pv, offsets_pv])
+        pv.set_new_attribute(
+            obj=grid, name="_dpf_cache_op", value=[cells_pv, celltypes_pv, nodes_pv, offsets_pv]
+        )
         return grid
 
 
@@ -350,7 +356,10 @@ def compute_offset():
 
         # Quick fix required to hold onto the data as PyVista does not make a copy.
         # All of those now return DPFArrays
-        setattr(grid, "_dpf_cache", [node_coordinates, coordinates_field])
+        # setattr(grid, "_dpf_cache", [node_coordinates, coordinates_field])
+        pv.set_new_attribute(
+            obj=grid, name="_dpf_cache", value=[node_coordinates, coordinates_field]
+        )
 
         return grid