diff --git a/src/project.conf b/src/project.conf
index 1d3469e..dac64cc 100644
--- a/src/project.conf
+++ b/src/project.conf
@@ -1,10 +1,12 @@
 targets=compare,fontsel,progress
-#cflags_force=-W `pkg-config gtk+-3.0 --cflags`
-cflags_force=-W `pkg-config gtk+-2.0 --cflags`
-cflags=-Wall -g -O2 -pedantic -fstack-protector -fPIE
-#ldflags_force=`pkg-config gtk+-3.0 --libs`
+cflags=-W -Wall -g -O2 -pedantic -fPIE -D_FORTIFY_SOURCE=2 -fstack-protector-all
+ldflags=-Wl,-pie -Wl,-z,relro -Wl,-z,now
+#for Gtk+ 2
+cflags_force=`pkg-config gtk+-2.0 --cflags`
 ldflags_force=`pkg-config gtk+-2.0 --libs`
-ldflags=-Wl,-pie
+#for Gtk+ 3
+#cflags_force=-W `pkg-config gtk+-3.0 --cflags`
+#ldflags_force=`pkg-config gtk+-3.0 --libs`
 dist=Makefile
 
 [compare]
@@ -20,6 +22,7 @@ install=$(BINDIR)
 [progress]
 type=binary
 sources=progress.c
+#for Gtk+ 3
 #cflags=`pkg-config --cflags gtk+-x11-3.0`
 #ldflags=`pkg-config --cflags gtk+-x11-3.0`
 install=$(BINDIR)