diff --git a/Makefile b/Makefile
index afc7ccf..28c0f14 100644
--- a/Makefile
+++ b/Makefile
@@ -28,10 +28,10 @@ SIZE=arm-none-eabi-size
 
 LFLAGS = -mlittle-endian -mthumb -mcpu=cortex-m0 -mthumb-interwork 
 LFLAGS += -mfloat-abi=soft --disable-newlib-supplied-syscalls -nostartfiles
-LFLAGS += -Tstartup/stm32f030.ld -Wl,-Map=$(mapfile).map -Wl,--gc-sections -g
+LFLAGS += -Tstartup/stm32f030.ld -Wl,-Map=$(mapfile).map -Wl,--gc-sections -g -Os
 
 CFLAGS = -c -fmessage-length=0 -mlittle-endian -mthumb -mcpu=cortex-m0 -mthumb-interwork
-CFLAGS += -mfloat-abi=soft -nostartfiles -Wall -g
+CFLAGS += -mfloat-abi=soft -nostartfiles -Wall -g -Os
 
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