diff --git a/fpga/hls/internal_packet_generator.cpp b/fpga/hls/internal_packet_generator.cpp
index 6f280deb..2f3df9b5 100644
--- a/fpga/hls/internal_packet_generator.cpp
+++ b/fpga/hls/internal_packet_generator.cpp
@@ -14,7 +14,7 @@ void internal_packet_generator(STREAM_512 &data_in, STREAM_512 &data_out,
 #pragma HLS INTERFACE register both axis port=addr_in
 #pragma HLS INTERFACE register both axis port=addr_out
 #pragma HLS INTERFACE m_axi port=frame bundle=frame depth=512 offset=off \
-        max_read_burst_length=16  max_write_burst_length=16 latency=2 num_write_outstanding=8 num_read_outstanding=9
+        max_read_burst_length=16 max_write_burst_length=16 latency=2 num_write_outstanding=2 num_read_outstanding=2
 
 #pragma HLS INTERFACE ap_none register port=in_cancel