<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.8.0-beta4</version>
</dependency>
<parent> <groupId>org.slf4j</groupId> <artifactId>slf4j-parent</artifactId> <version>1.8.0-beta4</version> </parent>