diff --git a/requirements.in b/requirements.in
index 2c9cae49..0c0f80eb 100644
--- a/requirements.in
+++ b/requirements.in
@@ -12,7 +12,7 @@ djangorestframework>=3.10.3,<3.15
 importlib-metadata==6.1.0
 jsonschema==4.17.3
 lxml==4.9.2
-marshmallow==3.19.0
+marshmallow==3.20.1
 pydantic==2.4.2
 pyOpenSSL==23.2.0
 pytz==2023.3
diff --git a/requirements.txt b/requirements.txt
index a9907a60..40caecb7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ lxml==4.9.2
     # via
     #   -r requirements.in
     #   signxml
-marshmallow==3.19.0
+marshmallow==3.20.1
     # via -r requirements.in
 packaging==23.1
     # via marshmallow