diff --git a/Makefile b/Makefile
index 189541f..36f767c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: all clean
+.PHONY: all clean mrproper
 
 SIZE = 32
 TEMPSIZE = $(shell echo $(SIZE) '*4' | bc)
@@ -92,4 +92,5 @@ public/js/snek.js: $(wildcard src/js/*.js)
 
 clean:
 	rm -f build/*.*
+mrproper: clean
 	rm -f $(OUTPUT)