diff --git a/greenbook/fusotao-greenbook-draft.pdf b/greenbook/fusotao-greenbook-draft.pdf
index b3818ca..3254502 100644
Binary files a/greenbook/fusotao-greenbook-draft.pdf and b/greenbook/fusotao-greenbook-draft.pdf differ
diff --git a/greenbook/fusotao-greenbook-draft.tex b/greenbook/fusotao-greenbook-draft.tex
index edc3c93..346cbea 100644
--- a/greenbook/fusotao-greenbook-draft.tex
+++ b/greenbook/fusotao-greenbook-draft.tex
@@ -22,7 +22,7 @@
 \date{2021}
 \title{Fusotao Greenbook(Draft)\\\medskip
   \large v0.2.2\\\medskip
-  \large https//www.fusotao.org}
+  \large https://www.fusotao.org}
 \hypersetup{
  pdfauthor={Fusotao Dev Team},
  pdftitle={Fusotao Greenbook(Draft)},