Stabilized reforming catalyst

A process for reforming a naphtha fraction, which comprises contacting the naphtha fraction under reforming conditions and in the presence of hydrogen with a reforming catalyst, comprising an alumina support, derived from an alumina precursor, having distributed thereon from about 0.3 to about 1.5 weight percent platinum, from about 0.3 to about 1.5 weight percent rhenium, and from about 0.3 to about 2.0 weight percent chloride, wherein the precursor of the alumina support comprises at least about 75 weight percent boehmite, the average crystallite diameter of the boehmite being within the range from about 30 to about 60 Angstrom units.