diff --git a/quickstart/6-bmi-onnx-pytorch/requirements.txt b/quickstart/6-bmi-onnx-pytorch/requirements.txt
index 6fe7bc6..70f180a 100644
--- a/quickstart/6-bmi-onnx-pytorch/requirements.txt
+++ b/quickstart/6-bmi-onnx-pytorch/requirements.txt
@@ -4,7 +4,7 @@ numpy~=1.18.5
 onnxruntime==1.4.0
 opencv-python==4.4.0.42
 Pillow==7.2.0
-protobuf==3.13.0
+protobuf==3.15.0
 six==1.15.0
 torch==1.7.0+cpu
 torchvision==0.8.1+cpu