diff --git a/src/models/NftHolder.ts b/src/models/NftHolder.ts
index ab183f2..b463fe7 100644
--- a/src/models/NftHolder.ts
+++ b/src/models/NftHolder.ts
@@ -25,12 +25,12 @@ export class NftHolderClass extends BaseModule {
   public burn: boolean
 
   public static async parseEvent(event: typeof GeneralEvent) {
-    const address = event.address;
+    const address = event.address.toLowerCase();
     const chain = event.chain;
     const tokenId = event.decodedData.tokenId;
     const blockNumer = event.blockNumber;
     const burn = event.decodedData.to === ZERO_ADDRESS
-    const user = burn ? event.decodedData.from : event.decodedData.to
+    const user = (burn ? event.decodedData.from : event.decodedData.to).toLowerCase()
     let record = await NftHolder.findOne({ address, chain, tokenId })
     if (!record) {
       record = new NftHolder({ address, chain, tokenId, blockNumber: blockNumer, user, burn })
diff --git a/src/models/NftStake.ts b/src/models/NftStake.ts
index e479724..090112d 100644
--- a/src/models/NftStake.ts
+++ b/src/models/NftStake.ts
@@ -59,21 +59,24 @@ export class NftStakeClass extends BaseModule {
     }
    */
   public static async parseEvent(event: typeof GeneralEvent) {
-    const { user, infos } = event.decodedData
+    let { user, infos } = event.decodedData
     const isStake = event.event === STAKE_EVENT
     const blockNumber = event.blockNumber
     const chain = event.chain
     if (infos.length === 0) {
       return
     }
+    user = user?.toLowerCase()
     for (let info of infos) {
       let { nft, tokenId, start, stakeTime } = info
+      nft = nft?.toLowerCase()
+      let address = event.address?.toLowerCase()
       start = parseInt(start)
       stakeTime = parseInt(stakeTime)
       if (isStake) {
         logger.info(`stake nft: ${nft}, tokenId: ${tokenId}, user: ${user}, blockNumber: ${blockNumber}`)
         let record = new NftStake({ 
-          address: event.address,
+          address,
           chain, 
           nft, 
           tokenId, 
@@ -90,7 +93,7 @@ export class NftStakeClass extends BaseModule {
           { chain, nft, tokenId, start}, 
           { 
             status: 2, 
-            address: event.address,
+            address,
             user,
             redeemTime: Date.now() / 1000 | 0,
             blockNumber,