diff --git a/Makefile b/Makefile
index a48e271..871de73 100644
--- a/Makefile
+++ b/Makefile
@@ -57,8 +57,10 @@ flash: $(TARGET)
 	$(E) "[AVD] Flashing..."
 	$(Q) $(AVD) -l $(LOGFILE)    \
 	       -c $(ASP) -p $(ARCH)  \
-	       -U lfuse:w:0xFF:m     \
-	       -U hfuse:w:0xD2:m     \
+	       -U lfuse:w:0xC2:m     \
+	       -U hfuse:w:0x9F:m     \
+	       -U efuse:w:0xFF:m     \
+	       -U lock:w:0xFF:m      \
 	       -U flash:w:$<
 
 .PHONY: clean