diff --git a/requirements.txt b/requirements.txt
index c40434c..ffb6379 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,3 +16,4 @@ vtk==9.0.3
 wxPython==4.1.1
 Theano==1.0.5
 torch==1.9.1
+pyacvd==0.2.7
--
libgit2 0.21.2