diff --git a/requirements.txt b/requirements.txt
index 2b4189e..00cdb20 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 arrow==1.3.0
-marshmallow==3.21.3
+marshmallow==3.22.0
 paho-mqtt==2.1.0
 pymodbus==3.7.0
 pyyaml==6.0.2