diff --git a/setup.cfg b/setup.cfg
index 022ba09..531b00e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -43,7 +43,7 @@ install_requires =
     scikit-learn
     scipy
     tqdm
-    vtk
+    vtk==9.3.1
 python_requires = >=3.8
 package_dir =
     = src