The present invention describes specific crystalline forms of 5-chloro-N-(2-isopropoxy- 5-methyl-4-(piperidin-4-ylphenyl)-N-2-(isopropylsulfonyl)phenyl)-2,4-diamine. The present invention further relates to methods for preparing said crystalline forms, pharmaceutical compositions comprising said crystalline forms, and methods of using said crystalline forms and pharmaceutical compositions to treat disease.