diff --git a/pkg/apis/admissionregistration/v1/defaults.go b/pkg/apis/admissionregistration/v1/defaults.go
index 90e0af7cbf8..3fbc7a63d83 100644
--- a/pkg/apis/admissionregistration/v1/defaults.go
+++ b/pkg/apis/admissionregistration/v1/defaults.go
@@ -51,7 +51,7 @@ func SetDefaults_ValidatingWebhook(obj *admissionregistrationv1.ValidatingWebhoo
 	}
 	if obj.TimeoutSeconds == nil {
 		obj.TimeoutSeconds = new(int32)
-		*obj.TimeoutSeconds = 30
+		*obj.TimeoutSeconds = 10
 	}
 
 	if len(obj.AdmissionReviewVersions) == 0 {
@@ -83,7 +83,7 @@ func SetDefaults_MutatingWebhook(obj *admissionregistrationv1.MutatingWebhook) {
 	}
 	if obj.TimeoutSeconds == nil {
 		obj.TimeoutSeconds = new(int32)
-		*obj.TimeoutSeconds = 30
+		*obj.TimeoutSeconds = 10
 	}
 	if obj.ReinvocationPolicy == nil {
 		never := admissionregistrationv1.NeverReinvocationPolicy
diff --git a/staging/src/k8s.io/api/admissionregistration/v1/types.go b/staging/src/k8s.io/api/admissionregistration/v1/types.go
index bcee91d72c6..0f2d4bc924d 100644
--- a/staging/src/k8s.io/api/admissionregistration/v1/types.go
+++ b/staging/src/k8s.io/api/admissionregistration/v1/types.go
@@ -286,7 +286,7 @@ type ValidatingWebhook struct {
 	// the webhook call will be ignored or the API call will fail based on the
 	// failure policy.
 	// The timeout value must be between 1 and 30 seconds.
-	// Default to 30 seconds.
+	// Default to 10 seconds.
 	// +optional
 	TimeoutSeconds *int32 `json:"timeoutSeconds,omitempty" protobuf:"varint,7,opt,name=timeoutSeconds"`
 
@@ -418,7 +418,7 @@ type MutatingWebhook struct {
 	// the webhook call will be ignored or the API call will fail based on the
 	// failure policy.
 	// The timeout value must be between 1 and 30 seconds.
-	// Default to 30 seconds.
+	// Default to 10 seconds.
 	// +optional
 	TimeoutSeconds *int32 `json:"timeoutSeconds,omitempty" protobuf:"varint,7,opt,name=timeoutSeconds"`