diff --git a/manifests/bases/helm-controller/patch.yaml b/manifests/bases/helm-controller/patch.yaml
index fe49320a..79773699 100644
--- a/manifests/bases/helm-controller/patch.yaml
+++ b/manifests/bases/helm-controller/patch.yaml
@@ -4,3 +4,6 @@
 - op: add
   path: /spec/template/spec/serviceAccountName
   value: helm-controller
+- op: add
+  path: /spec/template/spec/priorityClassName
+  value: system-cluster-critical
diff --git a/manifests/bases/kustomize-controller/patch.yaml b/manifests/bases/kustomize-controller/patch.yaml
index aa588b2b..6ce23139 100644
--- a/manifests/bases/kustomize-controller/patch.yaml
+++ b/manifests/bases/kustomize-controller/patch.yaml
@@ -4,3 +4,6 @@
 - op: add
   path: /spec/template/spec/serviceAccountName
   value: kustomize-controller
+- op: add
+  path: /spec/template/spec/priorityClassName
+  value: system-cluster-critical
diff --git a/manifests/bases/source-controller/patch.yaml b/manifests/bases/source-controller/patch.yaml
index 911d1865..e55604ee 100644
--- a/manifests/bases/source-controller/patch.yaml
+++ b/manifests/bases/source-controller/patch.yaml
@@ -4,3 +4,6 @@
 - op: add
   path: /spec/template/spec/serviceAccountName
   value: source-controller
+- op: add
+  path: /spec/template/spec/priorityClassName
+  value: system-cluster-critical