diff --git a/.github/scripts/.helm-tests/default/result.yaml b/.github/scripts/.helm-tests/default/result.yaml
index 6ac09752ab..c36c9f0be9 100644
--- a/.github/scripts/.helm-tests/default/result.yaml
+++ b/.github/scripts/.helm-tests/default/result.yaml
@@ -9393,11 +9393,7 @@ webhooks:
       - lifecycle-operator
     - key: kubernetes.io/metadata.name
       operator: NotIn
-      values:
-      - cert-manager
-      - keptn-lifecycle-toolkit-system
-      - observability
-      - monitoring
+      values:  ["cert-manager","keptn-lifecycle-toolkit-system","observability","monitoring"]
     - key: kubernetes.io/metadata.name
       operator: NotIn
       values:
diff --git a/.github/scripts/.helm-tests/lifecycle-only/result.yaml b/.github/scripts/.helm-tests/lifecycle-only/result.yaml
index d2973db5ba..61200b38ad 100644
--- a/.github/scripts/.helm-tests/lifecycle-only/result.yaml
+++ b/.github/scripts/.helm-tests/lifecycle-only/result.yaml
@@ -6719,11 +6719,7 @@ webhooks:
       - lifecycle-operator
     - key: kubernetes.io/metadata.name
       operator: NotIn
-      values:
-      - cert-manager
-      - keptn-lifecycle-toolkit-system
-      - observability
-      - monitoring
+      values:  ["foo","bar"]
     - key: kubernetes.io/metadata.name
       operator: NotIn
       values:
diff --git a/.github/scripts/.helm-tests/lifecycle-only/values.yaml b/.github/scripts/.helm-tests/lifecycle-only/values.yaml
index 54d290a7b0..fd2f55533c 100644
--- a/.github/scripts/.helm-tests/lifecycle-only/values.yaml
+++ b/.github/scripts/.helm-tests/lifecycle-only/values.yaml
@@ -14,6 +14,7 @@ lifecycleOperator:
   scheduler:
     image:
       tag: v0.0.0
+  deniedNamespaces: ["foo", "bar"]
 
 metricsOperator:
   enabled: false
diff --git a/.github/scripts/.helm-tests/lifecycle-with-certs/result.yaml b/.github/scripts/.helm-tests/lifecycle-with-certs/result.yaml
index ba32da0ec4..b3c05338b2 100644
--- a/.github/scripts/.helm-tests/lifecycle-with-certs/result.yaml
+++ b/.github/scripts/.helm-tests/lifecycle-with-certs/result.yaml
@@ -6975,11 +6975,7 @@ webhooks:
       - lifecycle-operator
     - key: kubernetes.io/metadata.name
       operator: NotIn
-      values:
-      - cert-manager
-      - keptn-lifecycle-toolkit-system
-      - observability
-      - monitoring
+      values:  ["cert-manager","keptn-lifecycle-toolkit-system","observability","monitoring"]
     - key: kubernetes.io/metadata.name
       operator: NotIn
       values:
diff --git a/lifecycle-operator/chart/README.md b/lifecycle-operator/chart/README.md
index 302604183c..9b508e42b4 100644
--- a/lifecycle-operator/chart/README.md
+++ b/lifecycle-operator/chart/README.md
@@ -68,13 +68,14 @@ and application health checks
 
 ### Global
 
-| Name                      | Description                                                                                                                                     | Value           |
-| ------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- | --------------- |
-| `kubernetesClusterDomain` | overrides cluster.local                                                                                                                         | `cluster.local` |
-| `annotations`             | add deployment level annotations                                                                                                                | `{}`            |
-| `podAnnotations`          | adds pod level annotations                                                                                                                      | `{}`            |
-| `schedulingGatesEnabled`  | enables the scheduling gates in lifecycle-operator. This feature is available in alpha version from K8s 1.27 or 1.26 enabling the alpha version | `false`         |
-| `allowedNamespaces`       | specifies the allowed namespaces for the lifecycle orchestration functionality                                                                  | `[]`            |
+| Name                      | Description                                                                                                                                     | Value                                                                            |
+| ------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------- |
+| `kubernetesClusterDomain` | overrides cluster.local                                                                                                                         | `cluster.local`                                                                  |
+| `annotations`             | add deployment level annotations                                                                                                                | `{}`                                                                             |
+| `podAnnotations`          | adds pod level annotations                                                                                                                      | `{}`                                                                             |
+| `schedulingGatesEnabled`  | enables the scheduling gates in lifecycle-operator. This feature is available in alpha version from K8s 1.27 or 1.26 enabling the alpha version | `false`                                                                          |
+| `allowedNamespaces`       | specifies the allowed namespaces for the lifecycle orchestration functionality                                                                  | `[]`                                                                             |
+| `deniedNamespaces`        | specifies a list of namespaces where the lifecycle orchestration functionality is disabled, ignored if `allowedNamespaces` is set               | `["cert-manager","keptn-lifecycle-toolkit-system","observability","monitoring"]` |
 
 ### Keptn Scheduler
 
diff --git a/lifecycle-operator/chart/templates/lifecycle-mutating-webhook-configuration.yaml b/lifecycle-operator/chart/templates/lifecycle-mutating-webhook-configuration.yaml
index 50a0b479e5..dfdf0ff0ea 100644
--- a/lifecycle-operator/chart/templates/lifecycle-mutating-webhook-configuration.yaml
+++ b/lifecycle-operator/chart/templates/lifecycle-mutating-webhook-configuration.yaml
@@ -28,11 +28,7 @@ webhooks:
 {{- if eq (len .Values.allowedNamespaces) 0 }}
     - key: kubernetes.io/metadata.name
       operator: NotIn
-      values:
-      - cert-manager
-      - keptn-lifecycle-toolkit-system
-      - observability
-      - monitoring
+      values:  {{ .Values.deniedNamespaces | default list | toJson }}
 {{- else }}
     - key: kubernetes.io/metadata.name
       operator: In
diff --git a/lifecycle-operator/chart/values.yaml b/lifecycle-operator/chart/values.yaml
index 9c936f7beb..f0a7002047 100644
--- a/lifecycle-operator/chart/values.yaml
+++ b/lifecycle-operator/chart/values.yaml
@@ -163,7 +163,7 @@ lifecycleOperatorMetricsService:
   type: ClusterIP
 
 ## @section Global
-## Current available parameters: kubernetesClusterDomain, imagePullSecrets, schedulingGatesEnabled
+## Current available parameters: kubernetesClusterDomain, imagePullSecrets, schedulingGatesEnabled, allowedNamespaces, deniedNamespaces
 ## @param     kubernetesClusterDomain overrides cluster.local
 kubernetesClusterDomain: cluster.local
 ## @param     annotations add deployment level annotations
@@ -174,6 +174,12 @@ podAnnotations: {}
 schedulingGatesEnabled: false
 ## @param  allowedNamespaces specifies the allowed namespaces for the lifecycle orchestration functionality
 allowedNamespaces: []
+## @param  deniedNamespaces specifies a list of namespaces where the lifecycle orchestration functionality is disabled, ignored if `allowedNamespaces` is set
+deniedNamespaces:
+  - cert-manager
+  - keptn-lifecycle-toolkit-system
+  - observability
+  - monitoring
 
 # yamllint disable rule:line-length
 ## @section Keptn Scheduler