diff --git a/vidgrid.lua b/vidgrid.lua
old mode 100644
new mode 100755
index 7559d3d..94483c4
--- a/vidgrid.lua
+++ b/vidgrid.lua
@@ -1,3 +1,5 @@
+#!/usr/bin/env lua
+
 -- 1. CONFIGURATION
 
 screen_width = 1080 -- FIXME