> ## Documentation Index
> Fetch the complete documentation index at: https://doc.lucidworks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Appkit SDK 4.14.0 Release Notes

[localhost link]: http://localhost:3000/docs/4/app-studio/release-notes/appkit/4.14.0-release-notes

[mintlify link]: https://doc.lucidworks.com/docs/4/app-studio/release-notes/appkit/4.14.0-release-notes

[old doc.lw link]: https://doc.lucidworks.com/app-studio/4.2/ugpgma

**Release date:** 31 October 2022

## Additional upgrade steps

Upon upgrading, users should remove **src/main/resources/logback.xml** and create a new file called **simplelogger.properties** in the same directory with the following content:

```yml wrap  theme={"dark"}
# org.slf4j.simpleLogger.defaultLogLevel=debug
org.slf4j.simpleLogger.showDateTime=true
org.slf4j.simpleLogger.dateTimeFormat=yyyy-MM-dd HH:mm:ss:SSS Z

#org.slf4j.simpleLogger.log.my.class.path=DEBUG
org.slf4j.simpleLogger.log.twigkit=DEBUG
```

Going forward, the **simplelogger.properties** file will be used to configure additional logging. The default logging level is `INFO`, but can be changed using the `defaultLogLevel` property. Logging on a particular class can also be increased by adding a new line, such as `org.slf4j.simpleLogger.log.my.class.path=DEBUG`, changing `my.class.path` to the actual path, and setting the logging level as needed.

If your `pom.xml` file contains the following entry, remove it:

```xml wrap  theme={"dark"}
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.1.1</version>
</dependency>
```

## Improvements:

* Swapped out dependencies on Log4J 1.2.x with SL4J in the Appkit code base.

## Bug Fixes

* Fix for a bug that would prevent interval facets from toggling. Fix requires the `facet-list` tag to not use the `query=“”` attribute.
* Fix for an issue when using the **\<widget:spelling-suggestions>** component that would allow a cross-site scripting attack if the query term included a `script` tag and the Fusion **spellcheck** component returned a spell correction.