diff --git a/pyproject.toml b/pyproject.toml
index 1106fbf8..c6ad5dc5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -67,7 +67,7 @@ test = [
 ]
 test-extra = [
     "pyvista==0.45.2",
-    "vtk==9.4.0",
+    "vtk==9.4.2",
     "ansys-dpf-core==0.13.8",
 ]
 doc = [