How to tell proguard to keep enum constants and fields

Thanks to http://sourceforge.net/p/proguard/discussion/182455/thread/1c28f199/ I found solution for my question (<⁠fields> must be added):

-keepclassmembers class * extends java.lang.Enum {
    <fields>;
    public static **[] values();
    public static ** valueOf(java.lang.String);
}