diff --git a/Makefile b/Makefile
index 4eadf24..d7832c8 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 CC=clang
-CFLAGS=-pedantic -Wall -Wextra -std=c99 -D_GNU_SOURCE -O3
+CFLAGS=-pedantic -Wall -Wextra -std=c99 -D_GNU_SOURCE -Ofast
 
 all: shorten