diff --git a/stm-firmware/updater/ram-code/CMakeLists.txt b/stm-firmware/updater/ram-code/CMakeLists.txt
index ee004a6..3a14124 100644
--- a/stm-firmware/updater/ram-code/CMakeLists.txt
+++ b/stm-firmware/updater/ram-code/CMakeLists.txt
@@ -20,7 +20,7 @@ add_executable(${ELFFILE} ${SRCS} ${FATFS_SRCS} ${SDIO_SRCS} ${STM_PERIPH_SRCS}
 
 target_include_directories(${ELFFILE} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include ../../include)
 target_compile_options(${ELFFILE} PRIVATE -Wall -Wextra -Wold-style-declaration -Wuninitialized -Wmaybe-uninitialized -Wunused-parameter)
-target_compile_options(${ELFFILE} PRIVATE -mlittle-endian -mthumb -mcpu=cortex-m4 -mthumb-interwork -mfloat-abi=hard -mfpu=fpv4-sp-d16 -nostartfiles -Wimplicit-fallthrough=3 -Wsign-compare -O0 -g3)
+target_compile_options(${ELFFILE} PRIVATE -mlittle-endian -mthumb -mcpu=cortex-m4 -mthumb-interwork -mfloat-abi=hard -mfpu=fpv4-sp-d16 -nostartfiles -Wimplicit-fallthrough=3 -Wsign-compare -Os -g3)
 target_compile_definitions(${ELFFILE} PRIVATE -DGIT_VER=${GIT_DESCRIBE} -DHSE_VALUE=8000000UL -DSTM32F407xx -DSTM32F4XX -DARM_MATH_CM4 -DSAFETY_MEMORY_STRIPOUT_DUMP)
 target_link_options(${ELFFILE} PRIVATE -mlittle-endian -mthumb -mcpu=cortex-m4 -mthumb-interwork -mfloat-abi=hard -mfpu=fpv4-sp-d16 --disable-newlib-supplied-syscalls -nostartfiles -T${LINKER_SCRIPT} -Wl,--print-memory-usage)
 set(GEN_HEADER_PATH "${CMAKE_CURRENT_BINARY_DIR}/include/generated")