diff --git a/Makefile b/Makefile
index 9f308ba..30086a7 100644
--- a/Makefile
+++ b/Makefile
@@ -157,11 +157,11 @@ ICACHE_NUM_LINES=4
 # OrangeCrab with ECP85
 ifeq ($(FPGA_TARGET), ORANGE-CRAB)
 RESET_LOW=true
-CLK_INPUT=50000000
-CLK_FREQUENCY=40000000
+CLK_INPUT=48000000
+CLK_FREQUENCY=48000000
 LPF=constraints/orange-crab.lpf
 PACKAGE=CSFBGA285
-NEXTPNR_FLAGS=--um5g-85k --freq 40
+NEXTPNR_FLAGS=--um5g-85k --freq 48
 OPENOCD_JTAG_CONFIG=openocd/olimex-arm-usb-tiny-h.cfg
 OPENOCD_DEVICE_CONFIG=openocd/LFE5UM5G-85F.cfg
 endif