Update README.md

README.md

@@ -25,6 +25,12 @@ The model could be used for protein feature extraction or to be fine-tuned on do
 
 ### How to use
 
+Since this is a custom model, you need to install additional dependencies:
+
+```python
+pip install ablang
+```
+
 Here is how to use this model to get the features of a given antibody sequence in PyTorch:
 
 ```python