diff --git a/postgres-backup-s3/README.md b/postgres-backup-s3/README.md
index a5339de..83c933b 100644
--- a/postgres-backup-s3/README.md
+++ b/postgres-backup-s3/README.md
@@ -40,3 +40,9 @@ You can additionally set the `SCHEDULE` environment variable like `-e SCHEDULE="
 
 More information about the scheduling can be found [here](http://godoc.org/github.com/robfig/cron#hdr-Predefined_schedules).
 
+### Overwriting S3 files
+
+You can use the following environment variable to disable the timestamps and set a custom name for the S3 files.
+- `S3_FILENAME` a consistent filename to overwrite with your backup.  If not set will use a timestamp.
+
+
diff --git a/postgres-backup-s3/backup.sh b/postgres-backup-s3/backup.sh
index 6e5a7f0..5510c01 100644
--- a/postgres-backup-s3/backup.sh
+++ b/postgres-backup-s3/backup.sh
@@ -63,6 +63,12 @@ pg_dump $POSTGRES_HOST_OPTS $POSTGRES_DATABASE | gzip > dump.sql.gz
 
 echo "Uploading dump to $S3_BUCKET"
 
-cat dump.sql.gz | aws $AWS_ARGS s3 cp - s3://$S3_BUCKET/$S3_PREFIX/${POSTGRES_DATABASE}_$(date +"%Y-%m-%dT%H:%M:%SZ").sql.gz || exit 2
+if [ "${S3_FILENAME}" == "**None**" ]; then
+    S3_UPLOAD_PATH=s3://$S3_BUCKET/$S3_PREFIX/${POSTGRES_DATABASE}_$(date +"%Y-%m-%dT%H:%M:%SZ").sql.gz
+else
+    S3_UPLOAD_PATH=s3://$S3_BUCKET/$S3_PREFIX/${S3_FILENAME}.sql.gz
+fi
+
+cat dump.sql.gz | aws $AWS_ARGS s3 cp - "$S3_UPLOAD_PATH" || exit 2
 
 echo "SQL backup uploaded successfully"