# Breaking changes
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### Breaking changes from history version to latest version:
## #1
```javascript
mermaid.initialize({
sequenceDiagram:{
...
}
})
```
has been changed to
```javascript
mermaid.initialize({
sequence:{
...
}
})
```
## #2
In old versions you need to add CSS file to your HTML:
```html
```
or
```html
```
Now it is not needed to do so. And there are no more CSS files in distrubtion files.
You just
```javascript
mermaid.initialize({
theme: 'forest'
})
```
and it works like a charm.
This is because now the CSS is inline with SVG for portability.