diff --git a/mysql-backup-s3/Dockerfile b/mysql-backup-s3/Dockerfile
index 415abaf..d51e62c 100644
--- a/mysql-backup-s3/Dockerfile
+++ b/mysql-backup-s3/Dockerfile
@@ -20,6 +20,7 @@ ENV S3_PREFIX 'backup'
 ENV S3_FILENAME **None**
 ENV MULTI_FILES no
 ENV SCHEDULE **None**
+ENV DELETE_OLDER_THAN **None**
 
 ADD run.sh run.sh
 ADD backup.sh backup.sh
diff --git a/mysql-backup-s3/README.md b/mysql-backup-s3/README.md
index bb0d3f7..bb46fa6 100644
--- a/mysql-backup-s3/README.md
+++ b/mysql-backup-s3/README.md
@@ -26,9 +26,16 @@ $ docker run -e S3_ACCESS_KEY_ID=key -e S3_SECRET_ACCESS_KEY=secret -e S3_BUCKET
 - `S3_S3V4` set to `yes` to enable AWS Signature Version 4, required for [minio](https://minio.io) servers (default: no)
 - `MULTI_FILES` Allow to have one file per database if set `yes` default: no)
 - `SCHEDULE` backup schedule time, see explainatons below
+- `DELETE_OLDER_THAN` delete old backups, see explanation and warning below
 
 ### Automatic Periodic Backups
 
 You can additionally set the `SCHEDULE` environment variable like `-e SCHEDULE="@daily"` to run the backup automatically.
 
 More information about the scheduling can be found [here](http://godoc.org/github.com/robfig/cron#hdr-Predefined_schedules).
+
+### Delete Old Backups
+
+You can additionally set the `DELETE_OLDER_THAN` environment variable like `-e DELETE_OLDER_THAN="30 days ago"` to delete old backups.
+
+WARNING: this will delete all files in the S3_PREFIX path, not just those created by this script.
diff --git a/mysql-backup-s3/backup.sh b/mysql-backup-s3/backup.sh
index eb604e4..6b6baa5 100644
--- a/mysql-backup-s3/backup.sh
+++ b/mysql-backup-s3/backup.sh
@@ -107,4 +107,22 @@ else
   fi
 fi
 
+if [ "${DELETE_OLDER_THAN}" != "**None**" ]; then
+  aws $AWS_ARGS s3 ls s3://$S3_BUCKET/$S3_PREFIX/ | grep " PRE " -v | while read -r line;
+    do
+      created=`echo $line|awk {'print $1" "$2'}`
+      created=`date -d "$created" +%s`
+      older_than=`date -d "$DELETE_OLDER_THAN" +%s`
+      if [ $created -lt $older_than ]
+        then
+          fileName=`echo $line|awk {'print $4'}`
+          if [ $fileName != "" ]
+            then
+              printf 'Deleting "%s"\n' $fileName
+              aws $AWS_ARGS s3 rm s3://$S3_BUCKET/$S3_PREFIX/$fileName
+          fi
+      fi
+    done;
+fi
+
 echo "SQL backup finished"
diff --git a/postgres-backup-s3/Dockerfile b/postgres-backup-s3/Dockerfile
index d5eed1c..a5b2959 100644
--- a/postgres-backup-s3/Dockerfile
+++ b/postgres-backup-s3/Dockerfile
@@ -18,6 +18,7 @@ ENV S3_PATH 'backup'
 ENV S3_ENDPOINT **None**
 ENV S3_S3V4 no
 ENV SCHEDULE **None**
+ENV DELETE_OLDER_THAN **None**
 
 ADD run.sh run.sh
 ADD backup.sh backup.sh
diff --git a/postgres-backup-s3/README.md b/postgres-backup-s3/README.md
index a5339de..81fb776 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).
 
+### Delete Old Backups
+
+You can additionally set the `DELETE_OLDER_THAN` environment variable like `-e DELETE_OLDER_THAN="30 days ago"` to delete old backups.
+
+WARNING: this will delete all files in the S3_PREFIX path, not just those created by this script.
+
diff --git a/postgres-backup-s3/backup.sh b/postgres-backup-s3/backup.sh
index 6e5a7f0..9b37253 100644
--- a/postgres-backup-s3/backup.sh
+++ b/postgres-backup-s3/backup.sh
@@ -65,4 +65,22 @@ 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 [ "${DELETE_OLDER_THAN}" != "**None**" ]; then
+  aws $AWS_ARGS s3 ls s3://$S3_BUCKET/$S3_PREFIX/ | grep " PRE " -v | while read -r line;
+    do
+      created=`echo $line|awk {'print $1" "$2'}`
+      created=`date -d "$created" +%s`
+      older_than=`date -d "$DELETE_OLDER_THAN" +%s`
+      if [ $created -lt $older_than ]
+        then
+          fileName=`echo $line|awk {'print $4'}`
+          if [ $fileName != "" ]
+            then
+              printf 'Deleting "%s"\n' $fileName
+              aws $AWS_ARGS s3 rm s3://$S3_BUCKET/$S3_PREFIX/$fileName
+          fi
+      fi
+    done;
+fi
+
 echo "SQL backup uploaded successfully"