diff --git a/charts/syseleven-exporter-chart/Chart.yaml b/charts/syseleven-exporter-chart/Chart.yaml
index 602541b..54dd253 100644
--- a/charts/syseleven-exporter-chart/Chart.yaml
+++ b/charts/syseleven-exporter-chart/Chart.yaml
@@ -15,10 +15,10 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.4.0
+version: 0.5.0
 
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
-appVersion: 1.1.1
+appVersion: 1.2.0
diff --git a/charts/syseleven-exporter-chart/templates/secret.yaml b/charts/syseleven-exporter-chart/templates/secret.yaml
index 96df47a..767f54c 100644
--- a/charts/syseleven-exporter-chart/templates/secret.yaml
+++ b/charts/syseleven-exporter-chart/templates/secret.yaml
@@ -1,12 +1,29 @@
-  
+{{- if and (or .Values.openstack.username .Values.openstack.password) (or .Values.openstack.application_credential_id .Values.openstack.application_credential_secret) }}
+{{- fail "openstack.username/password and openstack.application_credential_id/application_credential_secret are mutually exclusive." }}
+{{- end }}
+{{- if not (or (and .Values.openstack.username .Values.openstack.password) (and .Values.openstack.application_credential_id .Values.openstack.application_credential_secret)) }}
+{{- fail "One of openstack.username/password or openstack.application_credential_id/application_credential_secret is required." }}
+{{- end }}
 apiVersion: v1
 kind: Secret
 metadata:
   name: {{ template "syseleven-exporter.secret" . }}
   labels:
-    {{- include "syseleven-exporter.labels" . | nindent 4 }}  
+    {{- include "syseleven-exporter.labels" . | nindent 4 }}
 type: Opaque
 stringData:
+{{- if .Values.openstack.username }}
   OS_USERNAME: {{ .Values.openstack.username }}
+{{- end }}
+{{- if .Values.openstack.password }}
   OS_PASSWORD: {{ .Values.openstack.password }}
-  OS_PROJECT_ID: {{ .Values.openstack.projectId }}
\ No newline at end of file
+{{- end }}
+{{- if .Values.openstack.projectId }}
+  OS_PROJECT_ID: {{ .Values.openstack.projectId }}
+{{- end }}
+{{- if .Values.openstack.application_credential_id }}
+  OS_APPLICATION_CREDENTIAL_ID: {{ .Values.openstack.application_credential_id }}
+{{- end }}
+{{- if .Values.openstack.application_credential_secret }}
+  OS_APPLICATION_CREDENTIAL_SECRET: {{ .Values.openstack.application_credential_secret }}
+{{- end }}
diff --git a/charts/syseleven-exporter-chart/values.yaml b/charts/syseleven-exporter-chart/values.yaml
index b76d6ae..9555612 100644
--- a/charts/syseleven-exporter-chart/values.yaml
+++ b/charts/syseleven-exporter-chart/values.yaml
@@ -74,3 +74,6 @@ openstack:
   projectId: ""
   username: ""
   password: ""
+  # or
+  application_credential_id: ""
+  application_credential_secret: ""