diff --git a/helm/templates/deployment.yaml b/helm/templates/deployment.yaml
index 139e4df..a568202 100644
--- a/helm/templates/deployment.yaml
+++ b/helm/templates/deployment.yaml
@@ -39,7 +39,7 @@ spec:
         checksum/configmap: {{ include (print $.Template.BasePath "/configmap.yaml") . | sha256sum }}
         {{- end }}
         {{- if $metrics.enabled }}
-        prometheus.io/port: {{ $metrics.prometheus.port | quote }}
+        prometheus.io/port: {{ .Values.env.targetPort | quote }}
         prometheus.io/scrape: {{ $metrics.prometheus.scrape | quote }}
         {{- end }}
         {{- if .Values.podAnnotations }}