The present invention is directed to pharmaceutical compositions and methods of using combination therapies containing 4-(cyclopropylamino)-2-(4-(4-(ethylsulfonyl)piperazin-1-yl)phenylamino)pyrimidine-5-carboxamide, or a pharmaceutically acceptable salt thereof, and fludarabine for the treatment of cell proliferative disorders, such as undesired acute myeloid leukemia (AML), chronic lymphocytic leukemia (CLL), non-Hodgkin lymphoma (NHL), including diffuse large B cell lymphoma (DLBCL) mantle cell lymphoma, acute lymphocytic leukemia (ALL), follicular lymphoma, Burkitts lymphoma, small Lymphocytic Lymphoma (SLL) and multiple myeloma.