diff --git a/requirements.prod.txt b/requirements.prod.txt
index 551832f8..a1eb847b 100644
--- a/requirements.prod.txt
+++ b/requirements.prod.txt
@@ -46,7 +46,7 @@ markupsafe==3.0.2
     # via
     #   jinja2
     #   werkzeug
-marshmallow==3.18.0
+marshmallow==3.26.2
     # via environs
 packaging==25.0
     # via