diff --git a/Makefile b/Makefile
index 7c84be3bc8d112aad993f8e7a86adc0405d95e03..0f5cdff7b9b6f03e80a320dcf64b52e7efd1f940 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ CUR_DIR=$(shell pwd)
 iTrustee_SDK_PATH=${CUR_DIR}
 TARGET_APP := libteec_adaptor.so
 APP_SOURCES += $(iTrustee_SDK_PATH)/src/CA/cloud/libteec_adaptor.c
-APP_CFLAGS += -fstack-protector-strong -fPIC
+APP_CFLAGS += -fstack-protector-strong -fPIC -ftrapv -s -D_FORTIFY_SOURCE=2 -O2
 APP_CFLAGS += -I$(iTrustee_SDK_PATH)/include/CA -I$(iTrustee_SDK_PATH)/thirdparty/open_source/libboundscheck/include
 
 APP_LDFLAGS += -z text -z now -z relro -z noexecstack -pie -shared