diff --git a/auctioning_platform/requirements.txt b/auctioning_platform/requirements.txt
index b203578f..c4add82e 100644
--- a/auctioning_platform/requirements.txt
+++ b/auctioning_platform/requirements.txt
@@ -32,7 +32,7 @@ itsdangerous==1.1.0       # via flask, flask-security, flask-wtf
 jinja2==2.11.3            # via flask, flask-babelex
 markupsafe==1.1.1         # via jinja2, wtforms
 marshmallow-dataclass==8.1.0  # via -r ./web_app/requirements.txt
-marshmallow==3.10.0        # via -r ./web_app/requirements.txt, marshmallow-dataclass
+marshmallow==3.11.1        # via -r ./web_app/requirements.txt, marshmallow-dataclass
 mypy-extensions==0.4.3    # via typing-inspect
 packaging==20.4           # via pytest
 passlib==1.7.4            # via flask-security
diff --git a/auctioning_platform/web_app/requirements.txt b/auctioning_platform/web_app/requirements.txt
index d4b43c3d..a839345c 100644
--- a/auctioning_platform/web_app/requirements.txt
+++ b/auctioning_platform/web_app/requirements.txt
@@ -4,7 +4,7 @@ Flask-Security==3.0.0
 Flask-Injector==0.12.0
 Flask==1.1.2
 bcrypt==3.1.7
-marshmallow==3.10.0
+marshmallow==3.11.1
 marshmallow-dataclass==8.1.0
 Flask-Login==0.5.0
 SQLAlchemy==1.3.19