diff --git a/charts/spiderpool/crds/spiderpool.spidernet.io_spiderippools.yaml b/charts/spiderpool/crds/spiderpool.spidernet.io_spiderippools.yaml
index fa480693e0..1731f12dec 100644
--- a/charts/spiderpool/crds/spiderpool.spidernet.io_spiderippools.yaml
+++ b/charts/spiderpool/crds/spiderpool.spidernet.io_spiderippools.yaml
@@ -275,7 +275,7 @@ spec:
               vlan:
                 default: 0
                 format: int64
-                maximum: 4095
+                maximum: 4094
                 minimum: 0
                 type: integer
             required:
diff --git a/pkg/k8s/apis/spiderpool.spidernet.io/v2beta1/spiderippool_types.go b/pkg/k8s/apis/spiderpool.spidernet.io/v2beta1/spiderippool_types.go
index 5b4dba8e2a..34fc06cce6 100644
--- a/pkg/k8s/apis/spiderpool.spidernet.io/v2beta1/spiderippool_types.go
+++ b/pkg/k8s/apis/spiderpool.spidernet.io/v2beta1/spiderippool_types.go
@@ -26,7 +26,7 @@ type IPPoolSpec struct {
 	Gateway *string `json:"gateway,omitempty"`
 
 	// +kubebuilder:default=0
-	// +kubebuilder:validation:Maximum=4095
+	// +kubebuilder:validation:Maximum=4094
 	// +kubebuilder:validation:Minimum=0
 	// +kubebuilder:validation:Optional
 	Vlan *int64 `json:"vlan,omitempty"`