# Amazon EMR 6.7.0 - Tez release notes
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## Amazon EMR 6.7.0 - Tez changes
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| Type | Description | 
| --- | --- | 
| Backport | [TEZ-4403](https://issues.apache.org/jira/browse/TEZ-4403): Upgrade SLF4J version to 1.7.36 | 
| Backport | [TEZ-4405](https://issues.apache.org/jira/browse/TEZ-4405): Replace log4j 1.x with reload4j | 
| Backport | [TEZ-4411](https://issues.apache.org/jira/browse/TEZ-4411): Tez Build Failure: FileSaver.js not found |