# Hugging Face Transformers v3.0.1 — Release & Upgrade Intelligence
- **Product:** Hugging Face Transformers (https://huggingface.co)
- **Version:** v3.0.1
- **Released:** Jul 03, 2020
- **Impact Score:** 7/10
- **Breaking Changes:** Source flagged
- **Canonical Analysis:** https://changelogs.us/transformers/updates/v3.0.1/

## Executive Summary (TL;DR)
Hugging Face Transformers v3.0.1. Source highlight: Better backward-compatibility for tokenizers following v3.0.0 refactoring

## Breaking Changes & Deprecations
- This refactoring was conducted with a particular focus on keeping backward compatibility for the v2.X encoding, truncation and padding API but still led to two breaking changes that could have been avoided.

## Bug Fixes
- Better support for TransfoXL tokenizer when using TextGenerationPipeline https://github.com/huggingface/transformers/pull/5465 (@TevenLeScao)
- Fix use of meme Transformer-XL generations https://github.com/huggingface/transformers/pull/4826 (@tommccoy1)
- Fixing a bug in the NER pipeline which lead to discarding the last identified entity https://github.com/huggingface/transformers/pull/5439 (@mfuntowicz and @enzoampil)
- Better QAPipelines https://github.com/huggingface/transformers/pull/5429 (@mfuntowicz)
- Add Question-Answering and MLM heads to the Reformer model https://github.com/huggingface/transformers/pull/5433 (@patrickvonplaten)
- Refactoring the LongFormer https://github.com/huggingface/transformers/pull/5219 (@patrickvonplaten)

## Upgrade Command
```bash
python -m pip install 'transformers==3.0.1'
```