diff --git a/Makefile b/Makefile
index 8a97b2be8332dff6f77713b8bbbd8b013c516569..e3549663627311011e2d755da8ad05975a36238a 100644
--- a/Makefile
+++ b/Makefile
@@ -15,5 +15,5 @@ test: all
 	@ time -f "%C : %E seconds" ./prime.lua 100000 > /dev/null
 	@ time -f "%C : %E seconds" ./prime.php 100000 > /dev/null
 	@ time -f "%C : %E seconds" ./prime.rb 100000 > /dev/null
-	@ time -f "%C : %E seconds" node --use_strict prime.js 100000 > /dev/null
+	@ time -f "%C : %E seconds" ./prime.js 100000 > /dev/null
 	@ time -f "%C : %E seconds" ./prime.awk 100000 > /dev/null
diff --git a/prime.js b/prime.js
index 2c2a35c6d25d2d87dd0000a326e94cee586fb3f6..530ad069b4f640f9a95dad5a35182a3f1e2b532e 100755
--- a/prime.js
+++ b/prime.js
@@ -1,4 +1,5 @@
-#!/usr/bin/env node --use_strict
+#!/usr/bin/env node
+'use strict';
 
 function isPrime(num) {
   let num_sqr = Math.sqrt(num)