diff --git a/basic_setup/awss3.sh b/basic_setup/awss3.sh
index f5c54e0..e961c7a 100755
--- a/basic_setup/awss3.sh
+++ b/basic_setup/awss3.sh
@@ -43,7 +43,7 @@ aws s3api put-bucket-lifecycle-configuration \
         "ID": "DeleteOldEmails",
         "Status": "Enabled",
         "Expiration": {
-          "Days": 90
+          "Days": 30
         },
         "Filter": {
           "Prefix": ""