diff --git a/charts/steadybit-extension-prometheus/templates/deployment.yaml b/charts/steadybit-extension-prometheus/templates/deployment.yaml
index f7b73fb..4a25b97 100644
--- a/charts/steadybit-extension-prometheus/templates/deployment.yaml
+++ b/charts/steadybit-extension-prometheus/templates/deployment.yaml
@@ -29,6 +29,9 @@ spec:
         {{- toYaml . | nindent 8 }}
         {{- end }}
     spec:
+      {{- with .Values.priorityClassName }}
+      priorityClassName: {{ . }}
+      {{- end }}
       {{- with .Values.podSecurityContext }}
       securityContext:
       {{- toYaml . | nindent 8 }}
diff --git a/charts/steadybit-extension-prometheus/tests/__snapshot__/deployment_test.yaml.snap b/charts/steadybit-extension-prometheus/tests/__snapshot__/deployment_test.yaml.snap
index a75d5cd..9371316 100644
--- a/charts/steadybit-extension-prometheus/tests/__snapshot__/deployment_test.yaml.snap
+++ b/charts/steadybit-extension-prometheus/tests/__snapshot__/deployment_test.yaml.snap
@@ -424,6 +424,135 @@ manifest should match snapshot with mutual TLS using containerPaths:
               volumeMounts: null
           serviceAccountName: steadybit-extension-prometheus
           volumes: null
+manifest should match snapshot with podSecurityContext:
+  1: |
+    apiVersion: apps/v1
+    kind: Deployment
+    metadata:
+      labels:
+        steadybit.com/discovery-disabled: "true"
+      name: RELEASE-NAME-steadybit-extension-prometheus
+      namespace: NAMESPACE
+    spec:
+      replicas: 1
+      selector:
+        matchLabels:
+          app.kubernetes.io/instance: RELEASE-NAME
+          app.kubernetes.io/name: steadybit-extension-prometheus
+      template:
+        metadata:
+          annotations: null
+          labels:
+            app.kubernetes.io/instance: RELEASE-NAME
+            app.kubernetes.io/name: steadybit-extension-prometheus
+            steadybit.com/discovery-disabled: "true"
+        spec:
+          containers:
+            - env:
+                - name: STEADYBIT_LOG_LEVEL
+                  value: INFO
+                - name: STEADYBIT_LOG_FORMAT
+                  value: text
+                - name: STEADYBIT_EXTENSION_PROMETHEUS_INSTANCE_0_NAME
+                  value: null
+                - name: STEADYBIT_EXTENSION_PROMETHEUS_INSTANCE_0_ORIGIN
+                  value: null
+              image: ghcr.io/steadybit/extension-prometheus:latest
+              imagePullPolicy: Always
+              livenessProbe:
+                httpGet:
+                  path: /health/liveness
+                  port: 8088
+              name: extension
+              readinessProbe:
+                httpGet:
+                  path: /health/readiness
+                  port: 8088
+              resources:
+                limits:
+                  cpu: 200m
+                  memory: 128Mi
+                requests:
+                  cpu: 50m
+                  memory: 32Mi
+              securityContext:
+                allowPrivilegeEscalation: false
+                capabilities:
+                  drop:
+                    - ALL
+                readOnlyRootFilesystem: true
+                runAsGroup: 10000
+                runAsNonRoot: true
+                runAsUser: 10000
+              volumeMounts: null
+          securityContext:
+            runAsUser: 2222
+          serviceAccountName: steadybit-extension-prometheus
+          volumes: null
+manifest should match snapshot with priority class:
+  1: |
+    apiVersion: apps/v1
+    kind: Deployment
+    metadata:
+      labels:
+        steadybit.com/discovery-disabled: "true"
+      name: RELEASE-NAME-steadybit-extension-prometheus
+      namespace: NAMESPACE
+    spec:
+      replicas: 1
+      selector:
+        matchLabels:
+          app.kubernetes.io/instance: RELEASE-NAME
+          app.kubernetes.io/name: steadybit-extension-prometheus
+      template:
+        metadata:
+          annotations: null
+          labels:
+            app.kubernetes.io/instance: RELEASE-NAME
+            app.kubernetes.io/name: steadybit-extension-prometheus
+            steadybit.com/discovery-disabled: "true"
+        spec:
+          containers:
+            - env:
+                - name: STEADYBIT_LOG_LEVEL
+                  value: INFO
+                - name: STEADYBIT_LOG_FORMAT
+                  value: text
+                - name: STEADYBIT_EXTENSION_PROMETHEUS_INSTANCE_0_NAME
+                  value: null
+                - name: STEADYBIT_EXTENSION_PROMETHEUS_INSTANCE_0_ORIGIN
+                  value: null
+              image: ghcr.io/steadybit/extension-prometheus:latest
+              imagePullPolicy: Always
+              livenessProbe:
+                httpGet:
+                  path: /health/liveness
+                  port: 8088
+              name: extension
+              readinessProbe:
+                httpGet:
+                  path: /health/readiness
+                  port: 8088
+              resources:
+                limits:
+                  cpu: 200m
+                  memory: 128Mi
+                requests:
+                  cpu: 50m
+                  memory: 32Mi
+              securityContext:
+                allowPrivilegeEscalation: false
+                capabilities:
+                  drop:
+                    - ALL
+                readOnlyRootFilesystem: true
+                runAsGroup: 10000
+                runAsNonRoot: true
+                runAsUser: 10000
+              volumeMounts: null
+          priorityClassName: my-priority-class
+          serviceAccountName: steadybit-extension-prometheus
+          volumes: null
 manifest should match snapshot without TLS:
   1: |
     apiVersion: apps/v1
diff --git a/charts/steadybit-extension-prometheus/tests/deployment_test.yaml b/charts/steadybit-extension-prometheus/tests/deployment_test.yaml
index 91d07a9..ee19f08 100644
--- a/charts/steadybit-extension-prometheus/tests/deployment_test.yaml
+++ b/charts/steadybit-extension-prometheus/tests/deployment_test.yaml
@@ -66,3 +66,15 @@ tests:
         tags.datadoghq.com/service: steadybit-extension
     asserts:
       - matchSnapshot: {}
+  - it: manifest should match snapshot with podSecurityContext
+    set:
+      podSecurityContext:
+        runAsUser: 2222
+    asserts:
+      - matchSnapshot: {}
+
+  - it: manifest should match snapshot with priority class
+    set:
+      priorityClassName: my-priority-class
+    asserts:
+      - matchSnapshot: {}
diff --git a/charts/steadybit-extension-prometheus/values.yaml b/charts/steadybit-extension-prometheus/values.yaml
index 9efcc8f..961ef0d 100644
--- a/charts/steadybit-extension-prometheus/values.yaml
+++ b/charts/steadybit-extension-prometheus/values.yaml
@@ -82,6 +82,9 @@ topologySpreadConstraints: []
 # affinity -- Affinities to influence pod assignment.
 affinity: {}
 
+# priorityClassName -- Priority class used to influence pod scheduling priority.
+priorityClassName: ""
+
 # podSecurityContext -- SecurityContext to apply to the pod.
 podSecurityContext: {}