diff --git a/requirements.txt b/requirements.txt
index 3b2d540..b2f8470 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,5 +2,5 @@ Flask-SQLAlchemy==2.4.4
 SQLAlchemy==1.3.20
 Flask-Script==2.0.6
 py-ms[all]==2.7.0
-marshmallow==3.8.0
+marshmallow==3.9.0
 marshmallow-sqlalchemy==0.24.0