diff --git a/rtl/top/de25_nano_psmct32_raster_demo_top.sv b/rtl/top/de25_nano_psmct32_raster_demo_top.sv
index 526cbf4..5391443 100644
--- a/rtl/top/de25_nano_psmct32_raster_demo_top.sv
+++ b/rtl/top/de25_nano_psmct32_raster_demo_top.sv
@@ -2376,7 +2376,7 @@ module de25_nano_psmct32_raster_demo_top (
                        // queued requests. 8K retains 2,077 entries (34%) of
                        // measured headroom while halving the deep 93-bit FIFO's
                        // M20K/address-tree footprint at 310 MHz.
-                       .FB_PXW(ZFB_PXW), .FB_H(ZFB_H), .REQ_DEPTH(1024), .COL_DEPTH(128)) u_zc_emit (
+                       .FB_PXW(ZFB_PXW), .FB_H(ZFB_H), .REQ_DEPTH(8192), .COL_DEPTH(128)) u_zc_emit (
         .gs_clk(design_clk), .gs_rst_n(core_rst_n), .enable(1'b1),
         .g_valid(zc_g_valid), .g_ready(zc_g_ready), .g_x(zc_g_x), .g_y(zc_g_y), .g_zq(zc_g_zq),
         .g_zmsk(zc_g_zmsk), .g_ztest(zc_g_ztest), .g_ztst(zc_g_ztst), .g_color(zc_g_color), .g_alpha(zc_g_alpha), .g_be(zc_g_be), .g_scene(zc_g_scene),