diff --git a/config/kovan-config.js b/config/kovan-config.js
index d334618..d5ce9cd 100644
--- a/config/kovan-config.js
+++ b/config/kovan-config.js
@@ -77,7 +77,7 @@ module.exports = {
 
 
         //================= MysteryBox =================
-        MysteryBoxV1: "0x45136c2455Dd2631E31ab884cf167eC618CCf39a",
+        MysteryBoxV1: "0x97DD3a2bB801028D6b65F62b4cce9D07e4907EC2",
         RandomGenerator: "0x53F54E4760FA5f839e5624782D032495613DF218",
         RandomPool: [
             "0xa2e0ef85618732d80e5ef362773da1c92e8b1c57",
diff --git a/contracts/DODOMysteryBox/MysteryBoxV1.sol b/contracts/DODOMysteryBox/MysteryBoxV1.sol
index ee80226..cb588f6 100644
--- a/contracts/DODOMysteryBox/MysteryBoxV1.sol
+++ b/contracts/DODOMysteryBox/MysteryBoxV1.sol
@@ -55,7 +55,9 @@ contract MysteryBoxV1 is ERC721URIStorage, InitializableOwnable {
         string memory baseUri,
         address owner,
         address randomGenerator
-    ) public {
+    ) external {
+        require(owner != address(0));
+
         _name = name;
         _symbol = symbol;
         _baseUri = baseUri;
@@ -84,11 +86,11 @@ contract MysteryBoxV1 is ERC721URIStorage, InitializableOwnable {
         require(_REDEEM_ALLOWED_, "REDEEM_CLOSED");
         require(!address(msg.sender).isContract(), "ONLY_ALLOW_EOA");
         require(ticketNum >= 1 && ticketNum <= _USER_TICKETS_[msg.sender], "TICKET_NUM_INVALID");
+        _USER_TICKETS_[msg.sender] = _USER_TICKETS_[msg.sender].sub(ticketNum);
+        _TOTAL_TICKETS_ = _TOTAL_TICKETS_.sub(ticketNum);
         for (uint256 i = 0; i < ticketNum; i++) {
             _redeemSinglePrize(msg.sender);
         }
-        _USER_TICKETS_[msg.sender] = _USER_TICKETS_[msg.sender].sub(ticketNum);
-        _TOTAL_TICKETS_ = _TOTAL_TICKETS_.sub(ticketNum);
     }
 
     // ================= View ===================
diff --git a/contracts/lib/RandomGenerator.sol b/contracts/lib/RandomGenerator.sol
index e162b28..f134248 100644
--- a/contracts/lib/RandomGenerator.sol
+++ b/contracts/lib/RandomGenerator.sol
@@ -15,7 +15,7 @@ interface IDODOMidPrice {
     function getMidPrice() external view returns (uint256 midPrice);
 }
 
-contract RandomGenerator {
+contract RandomGenerator is IRandomGenerator{
     address[] public pools;
 
     constructor(address[] memory _pools) public {
@@ -24,7 +24,7 @@ contract RandomGenerator {
         }
     }
 
-    function random(uint256 seed) external view returns (uint256) {
+    function random(uint256 seed) external override view returns (uint256) {
         uint256 priceSum;
         for (uint256 i = 0; i < pools.length; i++) {
             priceSum += IDODOMidPrice(pools[i]).getMidPrice();
diff --git a/deploy-nft.txt b/deploy-nft.txt
index 5d5e5e3..f19166f 100644
--- a/deploy-nft.txt
+++ b/deploy-nft.txt
@@ -204,3 +204,9 @@ Deploy time: 2021/4/16 下午1:41:43
 Deploy type: MysteryBoxV1
 MysteryBoxV1Address:  0x45136c2455Dd2631E31ab884cf167eC618CCf39a
 Init MysteryBoxV1 Tx: 0xa8c1a3700aa806f234566ee4948f9e8c5ce31ded4d35dbb33821b14dda0d9379
+====================================================
+network type: kovan
+Deploy time: 2021/4/20 下午9:05:43
+Deploy type: MysteryBoxV1
+MysteryBoxV1Address:  0x97DD3a2bB801028D6b65F62b4cce9D07e4907EC2
+Init MysteryBoxV1 Tx: 0x0a8525b2215fab6cd63c6f74e50ad0eb8d293894ab3db49f2be027b0a4ee9dad