diff --git a/requirements.txt b/requirements.txt
index 8b657254..d935ea6b 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,6 +17,7 @@ Pillow
 # Conda commands (in place of pip) ---------------------------------------------
 # conda update -yn base -c defaults conda
 # conda install -yc anaconda numpy opencv matplotlib tqdm pillow ipython future
-# conda install -yc conda-forge scikit-image pycocotools onnx tensorboard
+# conda install -yc conda-forge scikit-image pycocotools tensorboard
 # conda install -yc spyder-ide spyder-line-profiler
 # conda install -yc pytorch pytorch torchvision
+# conda install -yc conda-forge protobuf numpy && pip install onnx  # https://github.com/onnx/onnx#linux-and-macos