diff --git a/src/project.conf b/src/project.conf
index ca5914f..521b8fb 100644
--- a/src/project.conf
+++ b/src/project.conf
@@ -1,6 +1,6 @@
 targets=../include/Init.h,../include/Session.h,Init
 cflags_force=-W `pkg-config --cflags libApp`
-cflags=-Wall -g -O2 -pedantic -fPIC -fstack-protector
+cflags=-Wall -g -O2 -pedantic -fPIC -D_FORTIFY_SOURCE=2 -fstack-protector-all
 ldflags_force=`pkg-config --libs libApp` -Wl,--export-dynamic
 ldflags=-pie -Wl,-z,relro -Wl,-z,now
 dist=Makefile,common.h,init.h,service.h,session.h