diff --git a/Documents.md b/Documents.md
index a843a49..ab52917 100644
--- a/Documents.md
+++ b/Documents.md
@@ -1,2 +1,3 @@
 1. [Tài liệu hướng dẫn sử dụng](https://docs.google.com/document/d/1to1AZSry6npnIxZu80hSyC8xslUR5AmLvZvwKG0THkY/edit?tab=t.0)
-2. [Tài liệu nghiên cứu](https://docs.google.com/document/d/1stOS94LzLVJIRa_2EanzmjbMmleh9tobyPT2sqflv6g/edit?tab=t.0)
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+2. [Tài liệu nghiên cứu](https://docs.google.com/document/d/1stOS94LzLVJIRa_2EanzmjbMmleh9tobyPT2sqflv6g/edit?tab=t.0)
+3. [Tài liệu đặc tả](https://docs.google.com/document/d/1sKUpW4dj1QM5Q8AO9J-9KvRB2o8GCiJ3i0oCaAOF98I/edit?usp=sharing)
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