diff --git a/bioviz/biorbd_vtk.py b/bioviz/biorbd_vtk.py
index c0695d8..5832e71 100644
--- a/bioviz/biorbd_vtk.py
+++ b/bioviz/biorbd_vtk.py
@@ -206,7 +206,7 @@ class _MarkerInternal:
     size: float
     color: tuple[float, float, float]
     opacity: float
-    actors: list[QVTKRenderWindowInteractor, ...]
+    actors: list[QVTKRenderWindowInteractor]
 
 
 class VtkModel(QtWidgets.QWidget):
@@ -284,7 +284,7 @@ def __init__(
                 actors=list(),
             ),
         }
-        self.markers_link_actors: list[QVTKRenderWindowInteractor, ...] = list()
+        self.markers_link_actors: list[QVTKRenderWindowInteractor] = list()
 
         self.contacts = Markers()
         self.contacts_size = contacts_size
@@ -461,7 +461,7 @@ def update_markers(self, markers):
         self._update_markers(markers, "model")
 
     def update_experimental_markers(
-        self, markers, with_link: bool = True, virtual_to_experimental_markers_indices: list[int, ...] = None
+        self, markers, with_link: bool = True, virtual_to_experimental_markers_indices: list[int] = None
     ):
         """
         Update position of the experimental markers on the screen (but do not repaint)
@@ -1842,7 +1842,7 @@ def new_gravity_vector(self, segment_rt, gravity, length, normalization_ratio, v
         Parameters
         ----------
         segment_rt : np.ndarray
-            homogeneous matrix in which coordinates are applied
+            homogenous matrix in which coordinates are applied
         gravity : np.ndarray
             gravity array with 3 application coordinates and 3 magnitude coordinates
         length : float