diff --git a/books/free-programming-books-subjects.md b/books/free-programming-books-subjects.md
index f45b8718..2700fc32 100644
--- a/books/free-programming-books-subjects.md
+++ b/books/free-programming-books-subjects.md
@@ -698,7 +698,7 @@ Books that cover a specific programming language can be found in the [BY PROGRAM
 * [How to Think Like a Computer Scientist](https://openbookproject.net/thinkcs/) - Peter Wentworth, Jeffrey Elkner, Allen B. Downey, Chris Meyers
 * [Image Processing in C: Analyzing and Enhancing Digital Images](https://homepages.inf.ed.ac.uk/rbf/BOOKS/PHILLIPS/) - Dwayne Phillips
 * [Information Technology and the Networked Economy](https://web.archive.org/web/20200731035935/https://florida.theorangegrove.org/og/file/49843a6a-9a9d-4bad-b4d4-d053f9cdf73e/1/InfoTechNetworkedEconomy.pdf) - Patrick McKeown (PDF) *( :card_file_box: archived)*
-* [Introduction to Scientific Programming in C++ and Fortran](https://web.corral.tacc.utexas.edu/CompEdu/pdf/isp/EijkhoutIntroSciProgramming-book.pdf) - Victor Eijkhout (PDF)
+* [Introduction to Scientific Programming in C++ and Fortran](https://github.com/VictorEijkhout/TheArtofHPC_pdfs/blob/main/vol3/EijkhoutIntroSciProgramming-book.pdf) - Victor Eijkhout (PDF)
 * [IRPF90 Fortran code generator](https://www.gitbook.com/book/scemama/irpf90/details) - Anthony Scemama
 * [Learn Programming](https://progbook.org) - Antti Salonen
 * [Learn to Program](https://pine.fm/LearnToProgram/) - Chris Pine
diff --git a/books/free-programming-books-zh.md b/books/free-programming-books-zh.md
index f5aa231a..d6e0161c 100644
--- a/books/free-programming-books-zh.md
+++ b/books/free-programming-books-zh.md
@@ -471,7 +471,7 @@
 * [Java Servlet 3.1 规范](https://github.com/waylau/servlet-3.1-specification)
 * [Jersey 2.x 用户指南](https://github.com/waylau/Jersey-2.x-User-Guide)
 * [JSSE 参考指南](https://github.com/waylau/jsse-reference-guide)
-* [MyBatis中文文档](http://mybatis.github.io/mybatis-3/zh/index.html)
+* [MyBatis中文文档](https://mybatis.org/mybatis-3/zh_CN/)
 * [Netty 4.x 用户指南](https://github.com/waylau/netty-4-user-guide)
 * [Netty 实战(精髓)](https://github.com/waylau/essential-netty-in-action)
 * [Nutz-book Nutz烹调向导](http://nutzbook.wendal.net)