diff --git a/src/project.conf b/src/project.conf
index d633abb..2c3bfa8 100644
--- a/src/project.conf
+++ b/src/project.conf
@@ -1,6 +1,6 @@
 targets=basename,cat,chgrp,chmod,chown,cksum,cmp,cp,date,df,dirname,du,echo,false,file,find,head,id,kill,link,ln,locale,logname,ls,mkdir,mkfifo,more,mv,nice,pr,printf,ps,pwd,renice,rm,rmdir,sleep,strings,tail,test,time,touch,true,tty,uname,uniq,unlink,wc,who
 cflags_force=-W
-cflags=-Wall -g -O2 -pedantic
+cflags=-Wall -g -O2 -pedantic -fstack-protector
 dist=Makefile,common.c
 
 [basename]
diff --git a/tools/project.conf b/tools/project.conf
index 524510c..84c95f4 100644
--- a/tools/project.conf
+++ b/tools/project.conf
@@ -1,6 +1,6 @@
 targets=utilbox
 cflags_force=-W
-cflags=-Wall -g -O2 -pedantic
+cflags=-Wall -g -O2 -pedantic -fstack-protector
 dist=Makefile,graph.sh,utils.sh,utilbox.h
 
 [utilbox]