diff --git a/server/tools/protobuild/metatable.proto b/server/tools/protobuild/metatable.proto
index 6a033fee..cf6d5da9 100755
--- a/server/tools/protobuild/metatable.proto
+++ b/server/tools/protobuild/metatable.proto
@@ -87,7 +87,7 @@ message SafeArea
     optional int32 rad = 3; //半径
     optional int32 wait_time = 4; //等待时间
     optional int32 shrink_speed = 5; //收缩速度
-    optional int32 hurt = 6; //伤害/秒
+    optional float hurt = 6; //伤害/秒
     optional int32 type = 7;
     optional int32 x1 = 8;
     optional int32 y1 = 9;