diff --git a/books/free-programming-books-ko.md b/books/free-programming-books-ko.md
index 0b5aacdb..db15e47e 100644
--- a/books/free-programming-books-ko.md
+++ b/books/free-programming-books-ko.md
@@ -40,7 +40,7 @@
 
 ### Assembly Language
 
-* [PC Assembly Language](http://drpaulcarter.com/pcasm/) - Paul A. Carter
+* [PC Assembly Language](http://pacman128.github.io/static/pcasm-book-korean.pdf) - Paul A. Carter (PDF)
 
 
 ### C