diff --git a/setup.cfg b/setup.cfg
index 2da3531..b7a9010 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -34,7 +34,7 @@ zip_safe = false
 install_requires =
     botocore~=1.29
     boto3~=1.26
-    marshmallow~=3.19.0
+    marshmallow>=3.19,<3.22
     tox~=4.14.2
     wheel
     flake8~=6.0.0