diff --git a/Makefile b/Makefile
index 725d9fe..ab6191d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-CFLAGS = -Wall -Wshadow -O2 -g
+CFLAGS = -Wall -Wshadow -O3 -g -march=native
 LDLIBS = -lm
 
 all: test example1 example2 example3 example4