diff --git a/requirements.txt b/requirements.txt
index 324e0ed..4261e94 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 # pw_lambda_lib
 botocore>=1.29
 boto3>=1.26
-marshmallow>=3.19.0
+marshmallow>=3.26.2