diff --git a/free-programming-books.md b/free-programming-books.md
index 6cb9f768ed6bf4cbad0fd14e29cd024c7383c77c..8e8fa23aa2b2fab10df8db54c317aad17b1e46be 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -1537,7 +1537,7 @@ For resources on Angular, Backbone, D3, Dojo, Ember, Express, jQuery, Knockout,
 ### Lua
 
 * [Lua 5.1 Reference Manual](http://www.lua.org/manual/5.1/)
-* [Programming Gems](http://www.lua.org/gems/)
+* [Programming in Lua (first edition)](https://www.lua.org/pil/contents.html)
 * [Wikibook](https://en.wikibooks.org/wiki/Lua_Programming)