diff --git a/controllers/actions.summerwind.net/horizontal_runner_autoscaler_webhook.go b/controllers/actions.summerwind.net/horizontal_runner_autoscaler_webhook.go
index a377fb9f..09013c7f 100644
--- a/controllers/actions.summerwind.net/horizontal_runner_autoscaler_webhook.go
+++ b/controllers/actions.summerwind.net/horizontal_runner_autoscaler_webhook.go
@@ -115,7 +115,7 @@ func (autoscaler *HorizontalRunnerAutoscalerGitHubWebhook) Handle(w http.Respons
 	}()
 
 	// respond ok to GET / e.g. for health check
-	if r.Method == http.MethodGet {
+	if strings.ToUpper(r.Method) == http.MethodGet {
 		ok = true
 		fmt.Fprintln(w, "webhook server is running")
 		return