diff --git a/fpga/arty_a7.xdc b/fpga/arty_a7.xdc
index 481d8e4..a635211 100644
--- a/fpga/arty_a7.xdc
+++ b/fpga/arty_a7.xdc
@@ -8,3 +8,7 @@ set_property -dict { PACKAGE_PIN A9    IOSTANDARD LVCMOS33 } [get_ports { uart0_
 
 set_property CONFIG_VOLTAGE 3.3 [current_design]
 set_property CFGBVS VCCO [current_design]
+
+set_property BITSTREAM.GENERAL.COMPRESS TRUE [current_design]
+set_property BITSTREAM.CONFIG.CONFIGRATE 33 [current_design]
+set_property CONFIG_MODE SPIx4 [current_design]
diff --git a/fpga/cmod_a7-35.xdc b/fpga/cmod_a7-35.xdc
index 5f4aab2..3492d54 100644
--- a/fpga/cmod_a7-35.xdc
+++ b/fpga/cmod_a7-35.xdc
@@ -6,3 +6,10 @@ set_property -dict { PACKAGE_PIN J18   IOSTANDARD LVCMOS33 } [get_ports { uart0_
 set_property -dict { PACKAGE_PIN J17   IOSTANDARD LVCMOS33 } [get_ports { uart0_rxd  }];
 
 set_property -dict { PACKAGE_PIN A18   IOSTANDARD LVCMOS33 } [get_ports { ext_rst }];
+
+set_property CONFIG_VOLTAGE 3.3 [current_design]
+set_property CFGBVS VCCO [current_design]
+
+set_property BITSTREAM.GENERAL.COMPRESS TRUE [current_design]
+set_property BITSTREAM.CONFIG.CONFIGRATE 33 [current_design]
+set_property CONFIG_MODE SPIx4 [current_design]
diff --git a/fpga/nexys-video.xdc b/fpga/nexys-video.xdc
index 6fc09f3..239376f 100644
--- a/fpga/nexys-video.xdc
+++ b/fpga/nexys-video.xdc
@@ -8,3 +8,7 @@ set_property -dict {PACKAGE_PIN V18 IOSTANDARD LVCMOS33} [get_ports uart0_rxd]
 
 set_property CONFIG_VOLTAGE 3.3 [current_design]
 set_property CFGBVS VCCO [current_design]
+
+set_property BITSTREAM.GENERAL.COMPRESS TRUE [current_design]
+set_property BITSTREAM.CONFIG.CONFIGRATE 33 [current_design]
+set_property CONFIG_MODE SPIx4 [current_design]
diff --git a/fpga/nexys_a7.xdc b/fpga/nexys_a7.xdc
index 08e73e2..a572772 100644
--- a/fpga/nexys_a7.xdc
+++ b/fpga/nexys_a7.xdc
@@ -8,3 +8,7 @@ set_property -dict {PACKAGE_PIN C4 IOSTANDARD LVCMOS33} [get_ports uart0_rxd]
 
 set_property CONFIG_VOLTAGE 3.3 [current_design]
 set_property CFGBVS VCCO [current_design]
+
+set_property BITSTREAM.GENERAL.COMPRESS TRUE [current_design]
+set_property BITSTREAM.CONFIG.CONFIGRATE 33 [current_design]
+set_property CONFIG_MODE SPIx4 [current_design]