diff --git a/free-programming-books-pt_BR.md b/free-programming-books-pt_BR.md
index 09c18841..9db44be9 100644
--- a/free-programming-books-pt_BR.md
+++ b/free-programming-books-pt_BR.md
@@ -85,6 +85,7 @@
 * [Desenvolvimento Web com HTML, CSS e JavaScript](https://www.caelum.com.br/apostila-html-css-javascript/) - Caelum
 * [Dive Into HTML5](http://diveintohtml5.com.br)
 * [Estruturando o HTML com CSS](http://pt-br.learnlayout.com)
+* [Performance WEB](http://www.webperf.com.br)
 
 
 ### Java