Update README.md

README.md

@@ -139,6 +139,6 @@ or [LinkedIn](https://www.linkedin.com/in/moritz-laurer/)
 The ernie-m architecture is only supported with transformers==4.27 or higher 
 (which is not yet released and causes an error in the inference widget as of 03.03.23). 
 In order to run the model before the release of 4.27, you need to install transformers from source with: `pip install git+https://github.com/huggingface/transformers`  
-After the release, you can run: `pip install transformers>=4.27`
-
+as well as the sentencepiece tokenizer with: `pip install sentencepiece`  
+After the release, you can run: `pip install transformers[sentencepiece]>=4.27`