diff --git a/requirements.in b/requirements.in
index 71207372d..343732374 100644
--- a/requirements.in
+++ b/requirements.in
@@ -14,7 +14,7 @@ git+https://github.com/benoitc/gunicorn.git@1299ea9e967a61ae2edebe191082fd169b86
 iso8601==1.0.2
 itsdangerous==2.1.2
 jsonschema[format]==4.5.1
-marshmallow-sqlalchemy==0.23.1 # pyup: <0.24.0 # marshmallow v3 throws errors
+marshmallow-sqlalchemy==0.28.0
 marshmallow==3.15.0
 psycopg2-binary==2.9.3
 PyJWT==2.4.0
diff --git a/requirements.txt b/requirements.txt
index bb154aa00..44eead9f2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -150,7 +150,7 @@ marshmallow==3.15.0
     #   -r requirements.in
     #   flask-marshmallow
     #   marshmallow-sqlalchemy
-marshmallow-sqlalchemy==0.23.1
+marshmallow-sqlalchemy==0.28.0
     # via -r requirements.in
 mistune==0.8.4
     # via notifications-utils