diff --git a/apis/flowmetrics/v1alpha1/flowmetric_webhook.go b/apis/flowmetrics/v1alpha1/flowmetric_webhook.go
index 70702e994..5883d41d4 100644
--- a/apis/flowmetrics/v1alpha1/flowmetric_webhook.go
+++ b/apis/flowmetrics/v1alpha1/flowmetric_webhook.go
@@ -70,18 +70,26 @@ func validateFlowMetric(_ context.Context, fMetric *FlowMetric) error {
 	}
 
 	if len(str) != 0 {
-		if !helper.FindFilter(str) {
+		if !helper.FindFilter(str, false) {
 			allErrs = append(allErrs, field.Invalid(field.NewPath("spec", "filters"), str,
 				fmt.Sprintf("invalid filter field: %s", str)))
 		}
 	}
 
 	if len(fMetric.Spec.Labels) != 0 {
-		if !helper.FindFilter(fMetric.Spec.Labels) {
+		if !helper.FindFilter(fMetric.Spec.Labels, false) {
 			allErrs = append(allErrs, field.Invalid(field.NewPath("spec", "labels"), fMetric.Spec.Labels,
 				fmt.Sprintf("invalid label name: %s", fMetric.Spec.Labels)))
 		}
 	}
+
+	if fMetric.Spec.ValueField != "" {
+		if !helper.FindFilter([]string{fMetric.Spec.ValueField}, true) {
+			allErrs = append(allErrs, field.Invalid(field.NewPath("spec", "valueField"), fMetric.Spec.ValueField,
+				fmt.Sprintf("invalid value field: %s", fMetric.Spec.ValueField)))
+		}
+	}
+
 	if len(allErrs) != 0 {
 		return apierrors.NewInvalid(
 			schema.GroupKind{Group: GroupVersion.Group, Kind: FlowMetric{}.Kind},
diff --git a/apis/flowmetrics/v1alpha1/flowmetric_webhook_test.go b/apis/flowmetrics/v1alpha1/flowmetric_webhook_test.go
index d33ab9f94..f82201556 100644
--- a/apis/flowmetrics/v1alpha1/flowmetric_webhook_test.go
+++ b/apis/flowmetrics/v1alpha1/flowmetric_webhook_test.go
@@ -79,6 +79,32 @@ func TestFlowMetric(t *testing.T) {
 			},
 			expectedError: "",
 		},
+		{
+			desc: "Valid valueField",
+			m: &FlowMetric{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "test1",
+					Namespace: "test-namespace",
+				},
+				Spec: FlowMetricSpec{
+					ValueField: "Bytes",
+				},
+			},
+			expectedError: "",
+		},
+		{
+			desc: "Invalid valueField",
+			m: &FlowMetric{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "test1",
+					Namespace: "test-namespace",
+				},
+				Spec: FlowMetricSpec{
+					ValueField: "DstAddr",
+				},
+			},
+			expectedError: "invalid value field",
+		},
 	}
 
 	for _, test := range tests {
diff --git a/pkg/helper/helpers.go b/pkg/helper/helpers.go
index 6a8d15fa1..4a989d279 100644
--- a/pkg/helper/helpers.go
+++ b/pkg/helper/helpers.go
@@ -92,21 +92,32 @@ func UnstructuredDuration(in *metav1.Duration) string {
 	return in.ToUnstructured().(string)
 }
 
-func FindFilter(labels []string) bool {
+func FindFilter(labels []string, isNumber bool) bool {
 	var cfg config.FrontendConfig
+	type filter struct {
+		exists bool
+		isNum  bool
+	}
 
 	err := yaml.Unmarshal(config.LoadStaticFrontendConfig(), &cfg)
 	if err != nil {
 		return false
 	}
 
-	labelMap := make(map[string]bool)
+	labelMap := make(map[string]filter)
 
 	for _, f := range cfg.Fields {
-		labelMap[f.Name] = true
+		labelMap[f.Name] = filter{true, false}
+		if f.Type == "number" {
+			labelMap[f.Name] = filter{true, true}
+		}
 	}
+
 	for _, l := range labels {
-		if ok := labelMap[l]; !ok {
+		if ok := labelMap[l].exists; !ok {
+			return false
+		}
+		if isNumber && !labelMap[l].isNum {
 			return false
 		}
 	}