diff --git a/deploy/k8s-dev/operator-rbac.yaml b/deploy/k8s-dev/operator-rbac.yaml
index ab88c72..7e894b2 100755
--- a/deploy/k8s-dev/operator-rbac.yaml
+++ b/deploy/k8s-dev/operator-rbac.yaml
@@ -18,6 +18,11 @@ rules:
   - apiGroups: ["rustfs.com"]
     resources: ["tenants/status"]
     verbs: ["update", "patch"]
+  # Required when deleting dependents whose ownerReference uses
+  # blockOwnerDeletion=true.
+  - apiGroups: ["rustfs.com"]
+    resources: ["tenants/finalizers"]
+    verbs: ["update"]
   - apiGroups: [""]
     resources: ["configmaps", "secrets"]
     verbs: ["get", "list", "watch"]
diff --git a/deploy/rustfs-operator/templates/clusterrole.yaml b/deploy/rustfs-operator/templates/clusterrole.yaml
index 13a2b37..4698dc9 100755
--- a/deploy/rustfs-operator/templates/clusterrole.yaml
+++ b/deploy/rustfs-operator/templates/clusterrole.yaml
@@ -13,6 +13,11 @@ rules:
   - apiGroups: ["rustfs.com"]
     resources: ["tenants/status"]
     verbs: ["update", "patch"]
+  # Required when deleting dependents whose ownerReference uses
+  # blockOwnerDeletion=true.
+  - apiGroups: ["rustfs.com"]
+    resources: ["tenants/finalizers"]
+    verbs: ["update"]
 
   # Referenced Secrets and ConfigMaps are watched cluster-wide but never mutated.
   - apiGroups: [""]
diff --git a/e2e/tests/finalizer_rbac_manifest.rs b/e2e/tests/finalizer_rbac_manifest.rs
new file mode 100644
index 0000000..ca73cb1
--- /dev/null
+++ b/e2e/tests/finalizer_rbac_manifest.rs
@@ -0,0 +1,114 @@
+// Copyright 2025 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use serde_yaml_ng::Value;
+use std::{collections::BTreeSet, path::PathBuf, process::Command};
+
+#[test]
+fn operator_rbac_can_update_tenant_finalizers() {
+    let root = repository_root();
+    let dev_rbac = std::fs::read_to_string(root.join("deploy/k8s-dev/operator-rbac.yaml"))
+        .expect("k8s-dev operator RBAC exists");
+    let dev_documents = yaml_documents(&dev_rbac, "k8s-dev operator RBAC");
+    assert_finalizer_update_rule(&dev_documents, "rustfs-operator");
+
+    let Some(rendered) = helm_template() else {
+        return;
+    };
+    assert!(
+        rendered.status.success(),
+        "default chart render failed: {}",
+        String::from_utf8_lossy(&rendered.stderr)
+    );
+    let output = String::from_utf8(rendered.stdout).expect("helm output is UTF-8");
+    assert_finalizer_update_rule(&yaml_documents(&output, "default chart"), "rustfs-operator");
+}
+
+fn repository_root() -> PathBuf {
+    PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .parent()
+        .expect("e2e crate has a repository parent")
+        .to_path_buf()
+}
+
+fn helm_template() -> Option<std::process::Output> {
+    if Command::new("helm").arg("version").output().is_err() {
+        assert!(
+            std::env::var_os("CI").is_none(),
+            "helm must be installed in CI"
+        );
+        eprintln!("skipping helm template assertions: helm is not installed");
+        return None;
+    }
+
+    Some(
+        Command::new("helm")
+            .arg("template")
+            .arg("rustfs-operator")
+            .arg(repository_root().join("deploy/rustfs-operator"))
+            .output()
+            .expect("helm template runs"),
+    )
+}
+
+fn yaml_documents(input: &str, description: &str) -> Vec<Value> {
+    input
+        .split("---")
+        .filter(|document| !document.trim().is_empty())
+        .map(|document| {
+            serde_yaml_ng::from_str(document)
+                .unwrap_or_else(|error| panic!("{description} contains invalid YAML: {error}"))
+        })
+        .collect()
+}
+
+fn assert_finalizer_update_rule(documents: &[Value], name: &str) {
+    let cluster_role = documents
+        .iter()
+        .find(|document| {
+            document["kind"].as_str() == Some("ClusterRole")
+                && document["metadata"]["name"].as_str() == Some(name)
+        })
+        .unwrap_or_else(|| panic!("missing ClusterRole {name}"));
+    let rules = cluster_role["rules"]
+        .as_sequence()
+        .expect("ClusterRole rules are a sequence");
+    let matching = rules
+        .iter()
+        .filter(|rule| yaml_strings(&rule["resources"]).contains("tenants/finalizers"))
+        .collect::<Vec<_>>();
+
+    assert_eq!(matching.len(), 1, "expected one Tenant finalizer rule");
+    assert_eq!(
+        yaml_strings(&matching[0]["apiGroups"]),
+        BTreeSet::from(["rustfs.com"])
+    );
+    assert_eq!(
+        yaml_strings(&matching[0]["resources"]),
+        BTreeSet::from(["tenants/finalizers"])
+    );
+    assert_eq!(
+        yaml_strings(&matching[0]["verbs"]),
+        BTreeSet::from(["update"])
+    );
+}
+
+fn yaml_strings(value: &Value) -> BTreeSet<&str> {
+    value
+        .as_sequence()
+        .into_iter()
+        .flatten()
+        .filter_map(Value::as_str)
+        .collect()
+}