diff --git a/doc/T5577/T5577_Guide.md b/doc/T5577/T5577_Guide.md
index 5cf27bf02..6c39d6898 100644
--- a/doc/T5577/T5577_Guide.md
+++ b/doc/T5577/T5577_Guide.md
@@ -1,6 +1,6 @@
 # T5577 Introduction Guide
 
-### Ver.1 8 Jul 2019
+### Ver.1 8 Sep 2019
 
 | Contents                                                                            |
 | ----------------------------------------------------------------------------------- |