diff --git a/free-programming-books.md b/free-programming-books.md
index b4c645cf732c6dc17b8afa8a94514b96e422655e..b84d95a288b5cf593e1763134aec880d97fa5576 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -1252,8 +1252,8 @@
 
 #### Bootstrap
 
-* [Twitter Bootstrap 3 Succinctly](https://www.syncfusion.com/resources/techportal/ebooks/twitterbootstrap3) (PDF, Kindle) *(Just fill the fields with any values)*
-* [Twitter Bootstrap Succinctly](https://www.syncfusion.com/resources/techportal/ebooks/twitterbootstrap) (PDF, Kindle) *(Just fill the fields with any values)*
+* [Twitter Bootstrap 3 Succinctly](https://www.syncfusion.com/resources/techportal/details/ebooks/twitterbootstrap3) (PDF, Kindle) *(Just fill the fields with any values)*
+* [Twitter Bootstrap Succinctly](https://www.syncfusion.com/resources/techportal/details/ebooks/twitterbootstrap) (PDF, Kindle) *(Just fill the fields with any values)*
 
 
 #### HTTP