diff --git a/protos/CommonProto.proto b/protos/CommonProto.proto
index 5e905a6..d7cc317 100644
--- a/protos/CommonProto.proto
+++ b/protos/CommonProto.proto
@@ -55,6 +55,7 @@ option optimize_for = SPEED;
 		optional int32 itemNum = 2;
 		optional int32 endingTime = 3;
 		optional int32 nextFlushTime = 4; //下次刷新时间 0 不刷新
+		optional int32 expirationTime = 5; //道具到期时间，0为永久
 	}