diff --git a/webhook/resource_url_notifier.go b/webhook/resource_url_notifier.go
index e3e63144..e36cffaa 100644
--- a/webhook/resource_url_notifier.go
+++ b/webhook/resource_url_notifier.go
@@ -42,8 +42,8 @@ var (
 )
 
 type ResourceURLNotifierConfig struct {
-	MaxAge   time.Duration
-	MaxDepth int
+	MaxAge   time.Duration `yaml:"max_age,omitempty"`
+	MaxDepth int           `yaml:"max_depth,omitempty"`
 }
 
 var DefaultResourceURLNotifierConfig = ResourceURLNotifierConfig{
diff --git a/webhook/url_notifier.go b/webhook/url_notifier.go
index 76c275fc..3b97759c 100644
--- a/webhook/url_notifier.go
+++ b/webhook/url_notifier.go
@@ -38,8 +38,8 @@ const (
 )
 
 type URLNotifierConfig struct {
-	NumWorkers int
-	QueueSize  int
+	NumWorkers int `yaml:"num_workers,omitempty"`
+	QueueSize  int `yaml:"queue_size,omitempty"`
 }
 
 var DefaultURLNotifierConfig = URLNotifierConfig{