From Longman Dictionary of Contemporary Englishchange your spotschange your spotsto change your character completely US business has changed its spots in recent years. → change
Examples from the Corpus
change your spots• We are happy to report, therefore, that Jaguar Man appears to have changed his spots.• Agitatedly, it changed its spots from orange to blue to green and, finally, flushed perfectly purple.• The leopard did not change its spots, its instincts or its appetites. 