diff --git a/templates/prometheus-postgres-exporter/serviceMonitorHTTP.yaml b/templates/prometheus-postgres-exporter/serviceMonitorHTTP.yaml
index 82c09b5..e213e44 100644
--- a/templates/prometheus-postgres-exporter/serviceMonitorHTTP.yaml
+++ b/templates/prometheus-postgres-exporter/serviceMonitorHTTP.yaml
@@ -26,7 +26,7 @@ spec:
     {{- end }}
     scrapeTimeout: {{ required "The scrape timeout of the serviceMonitor is not defined!" .Values.prometheus.metrics.serviceMonitor.scrapeTimeout }}
     scheme: {{ required "The scheme of the serviceMonitor is not defined!" .Values.prometheus.metrics.serviceMonitor.scheme}}
-    targetPort: {{ required "The port of the serviceMonitor is not defined!" .Values.prometheus.metrics.serviceMonitor.port }}
+    targetPort: {{ required "The port of the service is not defined!" .Values.services.http.port }}
     {{- with .Values.prometheus.metrics.serviceMonitor.tlsConfig }}
     tlsConfig:
       {{- toYaml . | nindent 6 }}
diff --git a/unittests/serviceMonitors/serviceMonitorHTTP.yaml b/unittests/serviceMonitors/serviceMonitorHTTP.yaml
index 3f481b7..3bb42ae 100644
--- a/unittests/serviceMonitors/serviceMonitorHTTP.yaml
+++ b/unittests/serviceMonitors/serviceMonitorHTTP.yaml
@@ -134,7 +134,6 @@ tests:
       action: "drop"
     prometheus.metrics.serviceMonitor.scrapeTimeout: "5s"
     prometheus.metrics.serviceMonitor.scheme: "http"
-    prometheus.metrics.serviceMonitor.port: 10443
   asserts:
   - hasDocuments:
       count: 1
@@ -166,7 +165,4 @@ tests:
       value: 5s
   - equal:
       path: spec.endpoints[0].scheme
-      value: http
-  - equal:
-      path: spec.endpoints[0].targetPort
-      value: 10443
\ No newline at end of file
+      value: http
\ No newline at end of file
diff --git a/values.yaml b/values.yaml
index 36606df..0c8ea2e 100644
--- a/values.yaml
+++ b/values.yaml
@@ -332,7 +332,6 @@ prometheus:
     ## @param prometheus.metrics.serviceMonitor.honorLabels Honor labels.
     ## @param prometheus.metrics.serviceMonitor.interval Interval at which metrics should be scraped. If not specified Prometheus' global scrape interval is used.
     ## @param prometheus.metrics.serviceMonitor.path HTTP path for scraping prometheus metrics.
-    ## @param prometheus.metrics.serviceMonitor.port HTTP port for scraping prometheus metrics.
     ## @param prometheus.metrics.serviceMonitor.relabelings RelabelConfigs to apply to samples before scraping. Prometheus Operator automatically adds relabelings for a few standard Kubernetes fields.
     ## @param prometheus.metrics.serviceMonitor.scrapeTimeout Timeout after which the scrape is ended. If not specified, global Prometheus scrape timeout is used.
     ## @param prometheus.metrics.serviceMonitor.scheme HTTP scheme to use for scraping. For example `http` or `https`.
@@ -347,7 +346,6 @@ prometheus:
       honorLabels: false
       interval: "60s"
       path: "/metrics"
-      port: 9187
       relabelings: []
       scrapeTimeout: "30s"
       scheme: "http"