diff --git a/fpga-xc2s30/fpga_felica.bit b/fpga-xc2s30/fpga_felica.bit
index 83009b499..30ea16e33 100644
Binary files a/fpga-xc2s30/fpga_felica.bit and b/fpga-xc2s30/fpga_felica.bit differ
diff --git a/fpga-xc2s30/fpga_hf.bit b/fpga-xc2s30/fpga_hf.bit
index 06a4569f9..72f3d619e 100644
Binary files a/fpga-xc2s30/fpga_hf.bit and b/fpga-xc2s30/fpga_hf.bit differ
diff --git a/fpga-xc2s30/fpga_hf_15.bit b/fpga-xc2s30/fpga_hf_15.bit
index 0e59dd3d0..5d99a0032 100644
Binary files a/fpga-xc2s30/fpga_hf_15.bit and b/fpga-xc2s30/fpga_hf_15.bit differ
diff --git a/fpga-xc2s30/fpga_lf.bit b/fpga-xc2s30/fpga_lf.bit
index 93a26841a..f5e5ce630 100644
Binary files a/fpga-xc2s30/fpga_lf.bit and b/fpga-xc2s30/fpga_lf.bit differ
diff --git a/fpga-xc2s30/hi_iso14443a.v b/fpga-xc2s30/hi_iso14443a.v
index c9bc64f94..d52ab4000 100644
--- a/fpga-xc2s30/hi_iso14443a.v
+++ b/fpga-xc2s30/hi_iso14443a.v
@@ -222,7 +222,7 @@ reg signed [10:0] rx_mod_falling_edge_max;
 reg signed [10:0] rx_mod_rising_edge_max;
 reg curbit;
 
-`define EDGE_DETECT_THRESHOLD   3
+`define EDGE_DETECT_THRESHOLD   5
 `define EDGE_DETECT_THRESHOLDHIGH   20
 
 always @(negedge adc_clk)