diff --git a/website/docs/api/morphologizer.mdx b/website/docs/api/morphologizer.mdx
index 2449e76aa..8f189d129 100644
--- a/website/docs/api/morphologizer.mdx
+++ b/website/docs/api/morphologizer.mdx
@@ -48,7 +48,7 @@ architectures and their arguments and hyperparameters.
 | `overwrite` <Tag variant="new">3.2</Tag>       | Whether the values of existing features are overwritten. Defaults to `True`. ~~bool~~                                                                                                                                                                                  |
 | `extend` <Tag variant="new">3.2</Tag>          | Whether existing feature types (whose values may or may not be overwritten depending on `overwrite`) are preserved. Defaults to `False`. ~~bool~~                                                                                                                      |
 | `scorer` <Tag variant="new">3.2</Tag>          | The scoring method. Defaults to [`Scorer.score_token_attr`](/api/scorer#score_token_attr) for the attributes `"pos"` and `"morph"` and [`Scorer.score_token_attr_per_feat`](/api/scorer#score_token_attr_per_feat) for the attribute `"morph"`. ~~Optional[Callable]~~ |
-| `label_smoothing` <Tag variant="new">3.6</Tag> | Label smoothing factor. Defaults to `0.0`. ~~float~~                                                                                                                                                                                                                   |
+| `label_smoothing` <Tag variant="new">3.6</Tag> | [Label smoothing](https://arxiv.org/abs/1906.02629) factor. Defaults to `0.0`. ~~float~~                                                                                                                                                                               |
 
 ```python
 %%GITHUB_SPACY/spacy/pipeline/morphologizer.pyx
diff --git a/website/docs/api/tagger.mdx b/website/docs/api/tagger.mdx
index fdd234335..d9b0506fb 100644
--- a/website/docs/api/tagger.mdx
+++ b/website/docs/api/tagger.mdx
@@ -46,7 +46,7 @@ architectures and their arguments and hyperparameters.
 | `overwrite` <Tag variant="new">3.2</Tag>       | Whether existing annotation is overwritten. Defaults to `False`. ~~bool~~                                                                                                                                                                                                                              |
 | `scorer` <Tag variant="new">3.2</Tag>          | The scoring method. Defaults to [`Scorer.score_token_attr`](/api/scorer#score_token_attr) for the attribute `"tag"`. ~~Optional[Callable]~~                                                                                                                                                            |
 | `neg_prefix` <Tag variant="new">3.2.1</Tag>    | The prefix used to specify incorrect tags while training. The tagger will learn not to predict exactly this tag. Defaults to `!`. ~~str~~                                                                                                                                                              |
-| `label_smoothing` <Tag variant="new">3.6</Tag> | Label smoothing factor. Defaults to `0.0`. ~~float~~                                                                                                                                                                                                                                                   |
+| `label_smoothing` <Tag variant="new">3.6</Tag> | [Label smoothing](https://arxiv.org/abs/1906.02629) factor. Defaults to `0.0`. ~~float~~                                                                                                                                                                                                               |
 
 ```python
 %%GITHUB_SPACY/spacy/pipeline/tagger.pyx