diff --git a/lib/src/rtc_video_renderer.dart b/lib/src/rtc_video_renderer.dart
index 7734fd3..4c4138f 100644
--- a/lib/src/rtc_video_renderer.dart
+++ b/lib/src/rtc_video_renderer.dart
@@ -69,4 +69,6 @@ abstract class VideoRenderer {
   set srcObject(MediaStream? stream);
 
   Future<void> dispose();
+
+  Future<void> setVolume(double value);
 }