diff --git a/charts/prometheus-adapter/Chart.yaml b/charts/prometheus-adapter/Chart.yaml
index a20001819a69..175c6d080e18 100644
--- a/charts/prometheus-adapter/Chart.yaml
+++ b/charts/prometheus-adapter/Chart.yaml
@@ -1,6 +1,6 @@
 apiVersion: v1
 name: prometheus-adapter
-version: 4.8.2
+version: 4.8.3
 appVersion: v0.11.2
 description: A Helm chart for k8s prometheus adapter
 home: https://github.com/kubernetes-sigs/prometheus-adapter
diff --git a/charts/prometheus-adapter/templates/deployment.yaml b/charts/prometheus-adapter/templates/deployment.yaml
index 0ea707606b0f..981f7dcde0f7 100644
--- a/charts/prometheus-adapter/templates/deployment.yaml
+++ b/charts/prometheus-adapter/templates/deployment.yaml
@@ -117,7 +117,9 @@ spec:
         {{- toYaml .Values.affinity | nindent 8 }}
       topologySpreadConstraints:
         {{- toYaml .Values.topologySpreadConstraints | nindent 8 }}
-      priorityClassName: {{ .Values.priorityClassName }}
+      {{- with .Values.priorityClassName }}
+      priorityClassName: {{ . }}
+      {{- end }}
       {{- if .Values.podSecurityContext }}
       securityContext:
         {{- toYaml .Values.podSecurityContext | nindent 8 }}