diff --git a/CHANGELOG b/CHANGELOG
index a9969bb69..8fcf4c4ea 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,6 @@
+2019-08-15 Version 1.36.88
+- QueryInstanceBillResponse add ServicePeriod.
+
 2019-08-14 Version 1.36.87
 - Generated 2018-01-20 for `Iot`.
 
diff --git a/VERSION b/VERSION
index 48fda88ee..eae60db32 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.36.87
\ No newline at end of file
+1.36.88
\ No newline at end of file
diff --git a/bssopenapi/include/alibabacloud/bssopenapi/model/QueryInstanceBillResult.h b/bssopenapi/include/alibabacloud/bssopenapi/model/QueryInstanceBillResult.h
index 00537db12..ac17b6f86 100644
--- a/bssopenapi/include/alibabacloud/bssopenapi/model/QueryInstanceBillResult.h
+++ b/bssopenapi/include/alibabacloud/bssopenapi/model/QueryInstanceBillResult.h
@@ -63,6 +63,7 @@ namespace AlibabaCloud
 						std::string billingItem;
 						std::string nickName;
 						std::string intranetIP;
+						std::string servicePeriod;
 						float deductedByResourcePackage;
 						std::string usageUnit;
 						long ownerID;
diff --git a/bssopenapi/src/model/QueryInstanceBillResult.cc b/bssopenapi/src/model/QueryInstanceBillResult.cc
index 404767421..77d3e120a 100644
--- a/bssopenapi/src/model/QueryInstanceBillResult.cc
+++ b/bssopenapi/src/model/QueryInstanceBillResult.cc
@@ -128,6 +128,8 @@ void QueryInstanceBillResult::parse(const std::string &payload)
 			itemObject.zone = value["Zone"].asString();
 		if(!value["Item"].isNull())
 			itemObject.item = value["Item"].asString();
+		if(!value["ServicePeriod"].isNull())
+			itemObject.servicePeriod = value["ServicePeriod"].asString();
 		data_.items.push_back(itemObject);
 	}
 	if(!value["Success"].isNull())