diff --git a/charts/prom-aggregation-gateway/Chart.yaml b/charts/prom-aggregation-gateway/Chart.yaml
index bb8897e6..ed8c53aa 100644
--- a/charts/prom-aggregation-gateway/Chart.yaml
+++ b/charts/prom-aggregation-gateway/Chart.yaml
@@ -1,6 +1,6 @@
 apiVersion: v2
 name: prom-aggregation-gateway
-version: 0.0.2
+version: 0.0.3
 home: https://github.com/zapier/prom-aggregation-gateway
 appVersion: latest
 description: cLabs prometheus aggregation gateway
diff --git a/charts/prom-aggregation-gateway/templates/_helpers.tpl b/charts/prom-aggregation-gateway/templates/_helpers.tpl
index db111788..586d27a4 100644
--- a/charts/prom-aggregation-gateway/templates/_helpers.tpl
+++ b/charts/prom-aggregation-gateway/templates/_helpers.tpl
@@ -44,3 +44,7 @@ app.kubernetes.io/managed-by: {{ .Release.Service }}
 app.kubernetes.io/name: {{ include "prom-aggregation-gateway.name" . }}
 app.kubernetes.io/instance: {{ .Release.Name }}
 {{- end }}
+
+{{- define "prom-aggregation-gateway.api-port" -}}
+{{- .Values.service.port }}
+{{- end -}}
diff --git a/charts/prom-aggregation-gateway/templates/ingress.yaml b/charts/prom-aggregation-gateway/templates/ingress.yaml
index 8104d9f3..d9475dcb 100644
--- a/charts/prom-aggregation-gateway/templates/ingress.yaml
+++ b/charts/prom-aggregation-gateway/templates/ingress.yaml
@@ -1,4 +1,6 @@
 {{- if .Values.ingress.enabled -}}
+{{- $fullName := include "prom-aggregation-gateway.fullname" . -}}
+{{- $svcPort := include "prom-aggregation-gateway.api-port" . -}}
 apiVersion: networking.k8s.io/v1
 kind: Ingress
 metadata:
@@ -33,9 +35,9 @@ spec:
             {{- end }}
             backend:
               service:
-                name: {{ include "prom-aggregation-gateway.fullname" . }}
+                name: {{ $fullName }}
                 port:
-                  number: api-port
+                  number: {{ $svcPort }}
           {{- end }}
     {{- end }}
 {{- end }}