diff --git a/charts/gardener-extension-os-ubuntu/templates/_helpers.tpl b/charts/gardener-extension-os-ubuntu/templates/_helpers.tpl
index 7b6631b0..090f5597 100644
--- a/charts/gardener-extension-os-ubuntu/templates/_helpers.tpl
+++ b/charts/gardener-extension-os-ubuntu/templates/_helpers.tpl
@@ -12,14 +12,4 @@ gardener-extension-os-ubuntu
 
 {{- define "deploymentversion" -}}
 apps/v1
-{{- end -}}
-
-{{- define "priorityclassversion" -}}
-{{- if semverCompare ">= 1.14-0" .Capabilities.KubeVersion.GitVersion -}}
-scheduling.k8s.io/v1
-{{- else if semverCompare ">= 1.11-0" .Capabilities.KubeVersion.GitVersion -}}
-scheduling.k8s.io/v1beta1
-{{- else -}}
-scheduling.k8s.io/v1alpha1
-{{- end -}}
 {{- end -}}
\ No newline at end of file
diff --git a/charts/gardener-extension-os-ubuntu/templates/deployment.yaml b/charts/gardener-extension-os-ubuntu/templates/deployment.yaml
index 139ff212..9239e90b 100644
--- a/charts/gardener-extension-os-ubuntu/templates/deployment.yaml
+++ b/charts/gardener-extension-os-ubuntu/templates/deployment.yaml
@@ -20,7 +20,7 @@ spec:
         app.kubernetes.io/name: gardener-extension-os-ubuntu
         app.kubernetes.io/instance: {{ .Release.Name }}
     spec:
-      priorityClassName: gardener-extension-os-ubuntu
+      priorityClassName: gardener-system-900
       serviceAccountName: gardener-extension-os-ubuntu
       containers:
       - name: gardener-extension-os-ubuntu
diff --git a/charts/gardener-extension-os-ubuntu/templates/priorityclass.yaml b/charts/gardener-extension-os-ubuntu/templates/priorityclass.yaml
deleted file mode 100644
index 8a5bd0d6..00000000
--- a/charts/gardener-extension-os-ubuntu/templates/priorityclass.yaml
+++ /dev/null
@@ -1,7 +0,0 @@
-apiVersion: {{ include "priorityclassversion" . }}
-kind: PriorityClass
-metadata:
-  name: gardener-extension-os-ubuntu
-value: 1000000000
-globalDefault: false
-description: "Priority class for the Gardener extension: os-ubuntu."
\ No newline at end of file
diff --git a/example/controller-registration.yaml b/example/controller-registration.yaml
index 4bfe27b8..54344026 100644
--- a/example/controller-registration.yaml
+++ b/example/controller-registration.yaml
@@ -5,7 +5,7 @@ metadata:
   name: os-ubuntu
 type: helm
 providerConfig:
-  chart: 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
+  chart: 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
   values:
     image:
       tag: v1.17.0-dev