diff --git a/hw/bsp/lpcxpresso11u68/board.mk b/hw/bsp/lpcxpresso11u68/board.mk
index b2899a2e0..b637b4b02 100644
--- a/hw/bsp/lpcxpresso11u68/board.mk
+++ b/hw/bsp/lpcxpresso11u68/board.mk
@@ -35,5 +35,6 @@ FREERTOS_PORT = ARM_CM0
 JLINK_DEVICE = LPC11U68
 JLINK_IF = swd
 
-# flash using jlink
-flash: flash-jlink
+# flash using pyocd 
+flash: $(BUILD)/$(BOARD)-firmware.hex
+	pyocd flash -t lpc11u68 $<
diff --git a/hw/bsp/lpcxpresso51u68/board.mk b/hw/bsp/lpcxpresso51u68/board.mk
index d1e9533f5..60485463c 100644
--- a/hw/bsp/lpcxpresso51u68/board.mk
+++ b/hw/bsp/lpcxpresso51u68/board.mk
@@ -41,5 +41,6 @@ FREERTOS_PORT = ARM_CM0
 JLINK_DEVICE = LPC51U68
 JLINK_IF = swd
 
-# flash using jlink
-#flash: flash-jlink
+# flash using pyocd (51u68 is not supported yet)
+flash: $(BUILD)/$(BOARD)-firmware.hex
+	pyocd flash -t LPC51U68 $<
diff --git a/hw/bsp/lpcxpresso54114/board.mk b/hw/bsp/lpcxpresso54114/board.mk
index 1d2bf9531..d4ef8c262 100644
--- a/hw/bsp/lpcxpresso54114/board.mk
+++ b/hw/bsp/lpcxpresso54114/board.mk
@@ -44,5 +44,5 @@ JLINK_DEVICE = LPC54114J256_M4
 JLINK_IF = swd
 
 # flash using pyocd
-flash: $(BUILD)/$(BOARD)-firmware.elf
-	pyocd flash -v -e auto -t LPC54114 $<
+flash: $(BUILD)/$(BOARD)-firmware.hex
+	pyocd flash -t LPC54114 $<