diff --git a/hook/handlers/index.go b/hook/handlers/index.go
index f1180e1..d6cf2b3 100644
--- a/hook/handlers/index.go
+++ b/hook/handlers/index.go
@@ -30,7 +30,7 @@ func Index(w http.ResponseWriter, r *http.Request) {
 
 	for key := range r.Header {
 		key_lower := strings.ToLower(key)
-		if strings.HasPrefix(key_lower, "cf-") || key_lower == "cdn-Loop" || key_lower == "x-real-ip" || key_lower == "x-forwarded-for" || key_lower == "x-forwarded-proto" {
+		if strings.HasPrefix(key_lower, "cf-") || key_lower == "cdn-loop" || key_lower == "x-real-ip" || key_lower == "x-forwarded-for" || key_lower == "x-forwarded-proto" {
 			r.Header.Del(key)
 		}
 	}