diff --git a/postgres-backup-s3/Dockerfile b/postgres-backup-s3/Dockerfile
index aa95c63..5aaaa2a 100644
--- a/postgres-backup-s3/Dockerfile
+++ b/postgres-backup-s3/Dockerfile
@@ -15,6 +15,8 @@ ENV S3_SECRET_ACCESS_KEY **None**
 ENV S3_BUCKET **None**
 ENV S3_REGION us-west-1
 ENV S3_PATH 'backup'
+ENV S3_ENDPOINT **None**
+ENV S3_S3V4 no
 ENV SCHEDULE **None**
 
 ADD run.sh run.sh
diff --git a/postgres-backup-s3/backup.sh b/postgres-backup-s3/backup.sh
index c4cbba2..6e5a7f0 100644
--- a/postgres-backup-s3/backup.sh
+++ b/postgres-backup-s3/backup.sh
@@ -43,6 +43,12 @@ if [ "${POSTGRES_PASSWORD}" = "**None**" ]; then
   exit 1
 fi
 
+if [ "${S3_ENDPOINT}" == "**None**" ]; then
+  AWS_ARGS=""
+else
+  AWS_ARGS="--endpoint-url ${S3_ENDPOINT}"
+fi
+
 # env vars needed for aws tools
 export AWS_ACCESS_KEY_ID=$S3_ACCESS_KEY_ID
 export AWS_SECRET_ACCESS_KEY=$S3_SECRET_ACCESS_KEY
@@ -57,6 +63,6 @@ pg_dump $POSTGRES_HOST_OPTS $POSTGRES_DATABASE | gzip > dump.sql.gz
 
 echo "Uploading dump to $S3_BUCKET"
 
-cat dump.sql.gz | aws s3 cp - s3://$S3_BUCKET/$S3_PREFIX/${POSTGRES_DATABASE}_$(date +"%Y-%m-%dT%H:%M:%SZ").sql.gz || exit 2
+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
 
 echo "SQL backup uploaded successfully"
diff --git a/postgres-backup-s3/run.sh b/postgres-backup-s3/run.sh
index 05dfcaa..8cc86cc 100644
--- a/postgres-backup-s3/run.sh
+++ b/postgres-backup-s3/run.sh
@@ -2,6 +2,10 @@
 
 set -e
 
+if [ "${S3_S3V4}" = "yes"]; then
+    aws configure set default.s3.signature_version s3v4
+fi
+
 if [ "${SCHEDULE}" = "**None**" ]; then
   sh backup.sh
 else