diff --git a/charts/kube-prometheus-stack/Chart.yaml b/charts/kube-prometheus-stack/Chart.yaml
index 02275ca1d811..7de3ea45cc59 100644
--- a/charts/kube-prometheus-stack/Chart.yaml
+++ b/charts/kube-prometheus-stack/Chart.yaml
@@ -23,7 +23,7 @@ name: kube-prometheus-stack
 sources:
   - https://github.com/prometheus-community/helm-charts
   - https://github.com/prometheus-operator/kube-prometheus
-version: 66.1.0
+version: 66.1.1
 appVersion: v0.78.1
 kubeVersion: ">=1.19.0-0"
 home: https://github.com/prometheus-operator/kube-prometheus
diff --git a/charts/kube-prometheus-stack/templates/prometheus/prometheus.yaml b/charts/kube-prometheus-stack/templates/prometheus/prometheus.yaml
index 2b6a5edf6953..9973dc2fced1 100644
--- a/charts/kube-prometheus-stack/templates/prometheus/prometheus.yaml
+++ b/charts/kube-prometheus-stack/templates/prometheus/prometheus.yaml
@@ -253,13 +253,13 @@ spec:
   scrapeConfigSelector:
     matchLabels:
       release: {{ $.Release.Name | quote }}
-{{ else if ne .Values.prometheus.prometheusSpec.scrapeConfigSelector nil }}
+{{ else if not (kindIs "invalid" .Values.prometheus.prometheusSpec.scrapeConfigSelector) }}
   scrapeConfigSelector: {}
 {{- end }}
 {{- if .Values.prometheus.prometheusSpec.scrapeConfigNamespaceSelector }}
   scrapeConfigNamespaceSelector:
 {{ tpl (toYaml .Values.prometheus.prometheusSpec.scrapeConfigNamespaceSelector | indent 4) . }}
-{{ else if ne .Values.prometheus.prometheusSpec.scrapeConfigNamespaceSelector nil }}
+{{ else if not (kindIs "invalid" .Values.prometheus.prometheusSpec.scrapeConfigNamespaceSelector) }}
   scrapeConfigNamespaceSelector: {}
 {{- end }}
 {{- if .Values.prometheus.prometheusSpec.storageSpec }}