diff --git a/requirements_demo.txt b/requirements_demo.txt
index 56d8198..efd6f5e 100644
--- a/requirements_demo.txt
+++ b/requirements_demo.txt
@@ -7,4 +7,5 @@ opencv-python
 scipy
 onnxruntime
 requests
-trimesh
\ No newline at end of file
+trimesh
+matplotlib