diff --git a/Dockerfile b/Dockerfile
index 335e678..6d3582e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@ ARG VCS_REF
 ENV SALT_VERSION="3004" \
     PYTHON_VERSION="3.8"
 
-ENV IMAGE_VERSION="${SALT_VERSION}"
+ENV IMAGE_VERSION="${SALT_VERSION}_1"
 
 ENV SALT_DOCKER_DIR="/etc/docker-salt" \
     SALT_ROOT_DIR="/etc/salt" \
diff --git a/README.md b/README.md
index a516bed..fff4053 100644
--- a/README.md
+++ b/README.md
@@ -507,6 +507,7 @@ Below you can find a list with the available options that can be used to customi
 | `SALT_API_SERVICE_ENABLED`         | Enable `salt-api` service. Default: `false`                                                                                                                                                                                |
 | `SALT_API_USER`                    | Set username for `salt-api` service. Default: `salt_api`                                                                                                                                                                   |
 | `SALT_API_USER_PASS`               | `SALT_API_USER` password. Required if `SALT_API_SERVICE_ENBALED` is `true` and `SALT_API_USER` is not empty. _Unset_ by default                                                                                            |
+| `SALT_API_CERT_CN`                 | Common name in the request. Default: `localhost` |
 | `SALT_MASTER_SIGN_PUBKEY`          | Sign the master auth-replies with a cryptographic signature of the master's public key. Possible values: 'True' or 'False'. Default: `False`                                                                               |
 | `SALT_MASTER_USE_PUBKEY_SIGNATURE` | Instead of computing the signature for each auth-reply, use a pre-calculated signature. This option requires `SALT_MASTER_SIGN_PUBKEY` set to 'True'. Possible values: 'True' or 'False'. Default: `True`                  |
 | `SALT_MASTER_SIGN_KEY_NAME`        | The customizable name of the signing-key-pair without suffix. Default: `master_sign`                                                                                                                                       |
diff --git a/assets/runtime/env-defaults.sh b/assets/runtime/env-defaults.sh
index bae2f93..40ccdbf 100755
--- a/assets/runtime/env-defaults.sh
+++ b/assets/runtime/env-defaults.sh
@@ -5,6 +5,7 @@ TIMEZONE=${TIMEZONE:-UTC}
 
 SALT_API_SERVICE_ENABLED=${SALT_API_SERVICE_ENABLED:-false}
 SALT_API_USER=${SALT_API_USER:-salt_api}
+SALT_API_CERT_CN=${SALT_API_CERT_CN:-localhost}
 
 SALT_LOG_ROTATE_FREQUENCY=${SALT_LOG_ROTATE_FREQUENCY:-weekly}
 SALT_LOG_ROTATE_RETENTION=${SALT_LOG_ROTATE_RETENTION:-52}
diff --git a/assets/runtime/functions.sh b/assets/runtime/functions.sh
index 1511880..af7678f 100755
--- a/assets/runtime/functions.sh
+++ b/assets/runtime/functions.sh
@@ -208,10 +208,9 @@ function configure_salt_api()
   echo "Configuring salt-api service ..."
 
   CERTS_PATH=/etc/pki
-  SALT_API_KEY_FILE='docker-salt-master'
-  rm -rf "${CERTS_PATH}/tls/certs/*"
-  salt-call --local tls.create_self_signed_cert cacert_path="${CERTS_PATH}" CN="${SALT_API_KEY_FILE}"
-  chown "${SALT_USER}": "${CERTS_PATH}/tls/certs/${SALT_API_KEY_FILE}".{crt,key}
+  rm -rf "${CERTS_PATH}"/tls/certs/*
+  salt-call --local tls.create_self_signed_cert cacert_path="${CERTS_PATH}" CN="${SALT_API_CERT_CN}"
+  chown "${SALT_USER}": "${CERTS_PATH}/tls/certs/${SALT_API_CERT_CN}".{crt,key}
 
   cat >> "${SALT_ROOT_DIR}/master" <<EOF
 
@@ -223,8 +222,8 @@ api_logfile: ${SALT_LOGS_DIR}/salt/api
 
 rest_cherrypy:
   port: 8000
-  ssl_crt: ${CERTS_PATH}/tls/certs/${SALT_API_KEY_FILE}.crt
-  ssl_key: ${CERTS_PATH}/tls/certs/${SALT_API_KEY_FILE}.key
+  ssl_crt: ${CERTS_PATH}/tls/certs/${SALT_API_CERT_CN}.crt
+  ssl_key: ${CERTS_PATH}/tls/certs/${SALT_API_CERT_CN}.key
 EOF
 
   # configure supervisord to start salt-api