diff --git a/sgl-kernel/csrc/gemm/int8_gemm_kernel.cu b/sgl-kernel/csrc/gemm/int8_gemm_kernel.cu
index f18c81865..b47904cb1 100644
--- a/sgl-kernel/csrc/gemm/int8_gemm_kernel.cu
+++ b/sgl-kernel/csrc/gemm/int8_gemm_kernel.cu
@@ -409,8 +409,8 @@ void sm89_dispatch_shape(
     cutlass_int8_scaled_mm<
         ElementOutput,
         ArchTag,
-        cutlass::gemm::GemmShape<32, 64, 128>,
-        cutlass::gemm::GemmShape<16, 64, 64>,
+        cutlass::gemm::GemmShape<128, 128, 64>,
+        cutlass::gemm::GemmShape<64, 64, 64>,
         InstructionShape,
         5>(out, mat_a, mat_b, scales_a, scales_b, bias);
   }