Getting UnsupportedClassVersionError: JVMCFRE003 error when using reflection Library

I use the org.reflection library in my code, and i have this error when i run it.

Error 500: javax.servlet.ServletException: java.lang.UnsupportedClassVersionError: JVMCFRE003 version majeure incorrecte; classe=org/reflections/Reflections, décalage=6

My java compiler is 1.6, it is running on a v8.5 web sphere server. And here's my dependency in my pom.xml :

<dependency>
    <groupId>org.reflections</groupId>
    <artifactId>reflections</artifactId>
    <version>0.9.12</version>
</dependency>

Any idea?