diff --git a/requirements.txt b/requirements.txt
index 2675b91..77b7f9f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,5 +35,5 @@ scipy==1.0.1
 six==1.11.0
 SQLAlchemy==1.3.8
 traitlets==4.3.2
-vtk==8.1.0
+vtk==9.0.1
 wcwidth==0.1.7