diff --git a/Makefile b/Makefile
index d22af13..27c87e3 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-CFLAGS = -ansi -pedantic -Wall -Wextra -O2 -Ofast -D_DEFAULT_SOURCE
+CFLAGS = -std=c11 -pedantic -Wall -Wextra -O2 -Ofast -D_DEFAULT_SOURCE -D_FORTIFY_SOURCE=2
 LDFLAGS = -lX11 -lGL -lGLEW -lm -lrt
 
 shadermeh: shadermeh.o window.o shader.o