diff --git a/middleware.go b/middleware.go
index eab9827..5ba9cc7 100644
--- a/middleware.go
+++ b/middleware.go
@@ -18,8 +18,9 @@ const (
 )
 
 var (
-	TraceIDKey = "trace-id"
-	SpanIDKey  = "span-id"
+	TraceIDKey   = "trace-id"
+	SpanIDKey    = "span-id"
+	RequestIDKey = "id"
 
 	RequestBodyMaxSize  = 64 * 1024 // 64KB
 	ResponseBodyMaxSize = 64 * 1024 // 64KB
@@ -165,7 +166,7 @@ func NewWithConfig(logger *slog.Logger, config Config) gin.HandlerFunc {
 		}
 
 		if config.WithRequestID {
-			baseAttributes = append(baseAttributes, slog.String("id", requestID))
+			baseAttributes = append(baseAttributes, slog.String(RequestIDKey, requestID))
 		}
 
 		// otel