Update README.md

README.md

@@ -8,7 +8,14 @@ license: cc-by-nc-sa-4.0
 
 This model represents an ONNX-optimized version of the original [roberta-base-formality-ranker](https://huggingface.co/s-nlp/roberta-base-formality-ranker) model.
 It has been specifically tailored for GPUs and may exhibit variations in performance when run on CPUs.
- 
+
+## Dependencies
+
+Please install the following dependency before you begin working with the model:
+```sh
+pip install optimum[onnxruntime-gpu]
+```
+
 ## How to use
 ```python
 from transformers import AutoTokenizer