diff --git a/ldoc.lua b/ldoc.lua
index aff63b9..06501fc 100644
--- a/ldoc.lua
+++ b/ldoc.lua
@@ -1,4 +1,4 @@
-#!/usr/bin/env lua
+#!/usr/bin/env lua5.4
 ---------------
 -- ## ldoc, a Lua documentation generator.
 --