diff --git a/Machine-Backend/requirements.txt b/Machine-Backend/requirements.txt
index 7f52783..43101f1 100644
--- a/Machine-Backend/requirements.txt
+++ b/Machine-Backend/requirements.txt
@@ -4,4 +4,5 @@ Flask-SQLAlchemy
 python-dotenv
 pymysql
 gunicorn
-cryptography
\ No newline at end of file
+cryptography
+pyserial
\ No newline at end of file