diff --git a/protos/request.proto b/protos/request.proto
index e855613..f0d07f3 100644
--- a/protos/request.proto
+++ b/protos/request.proto
@@ -10,6 +10,7 @@ message Relay {
     Undefined = 0; // 未定义
     ForceQw = 1;   // 强制前接点位(吸起)
     ForceHw = 2;   // 强制后接点位(落下)
+    CancelForce = 3; // 取消强制
   }
 }