diff --git a/Makefile b/Makefile
index 746b528..67a514d 100644
--- a/Makefile
+++ b/Makefile
@@ -4,9 +4,9 @@ start: prepublish
 	http-server
 
 index.html: Readme.md head.html foot.html package.json Makefile
-	cat head.html > build.html
+	cp head.html build.html
 	## Change <project name> to This
-	sed 's/&lt;project name&gt;/This/g' Readme.md >> build.md
+	sed 's/&lt;project name&gt;/This/g' Readme.md > build.md
 	marked -i build.md >> build.html
 	rm build.md
 	cat foot.html >> build.html