diff --git a/backend/migrations/20241126170930-change-chain-id-to-bigint.cjs b/backend/migrations/20241126170930-change-chain-id-to-bigint.cjs
new file mode 100644
index 0000000..0192843
--- /dev/null
+++ b/backend/migrations/20241126170930-change-chain-id-to-bigint.cjs
@@ -0,0 +1,45 @@
+require('dotenv').config();
+const { DataTypes } = require('sequelize');
+
+async function up({ context: queryInterface }) {
+    await queryInterface.changeColumn(
+        {schema: process.env.DATABASE_SCHEMA_NAME, tableName: 'sponsorship_policies'},
+        'ENABLED_CHAINS',
+        {
+            type: DataTypes.ARRAY(DataTypes.BIGINT),
+            allowNull: true
+        }
+    );
+
+    await queryInterface.changeColumn(
+        {schema: process.env.DATABASE_SCHEMA_NAME, tableName: 'contract_whitelist'},
+        'CHAIN_ID',
+        {
+            type: DataTypes.BIGINT,
+            allowNull: false
+        }
+    );
+}
+
+async function down({ context: queryInterface }) {
+    await queryInterface.changeColumn(
+        {schema: process.env.DATABASE_SCHEMA_NAME, tableName: 'sponsorship_policies'},
+        'ENABLED_CHAINS',
+        {
+            type: DataTypes.ARRAY(DataTypes.INTEGER),
+            allowNull: true
+        }
+    );
+
+    await queryInterface.changeColumn(
+        {schema: process.env.DATABASE_SCHEMA_NAME, tableName: 'contract_whitelist'},
+        'CHAIN_ID',
+        {
+            type: DataTypes.INTEGER,
+            allowNull: false
+        }
+    );
+}
+
+/** @type {import('sequelize-cli').Migration} */
+module.exports = {up, down};
diff --git a/backend/package.json b/backend/package.json
index a5d2855..df7a224 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "arka",
-  "version": "1.6.8",
+  "version": "1.6.9",
   "description": "ARKA - (Albanian for Cashier's case) is the first open source Paymaster as a service software",
   "type": "module",
   "directories": {
diff --git a/backend/src/models/contract-whitelist.ts b/backend/src/models/contract-whitelist.ts
index 89d3e74..f3b5ce4 100644
--- a/backend/src/models/contract-whitelist.ts
+++ b/backend/src/models/contract-whitelist.ts
@@ -40,9 +40,13 @@ export function initializeContractWhitelistModel(sequelize: Sequelize, schema: s
       field: 'ABI'
     },
     chainId: {
-      type: DataTypes.INTEGER,
+      type: DataTypes.BIGINT,
       allowNull: false,
-      field: 'CHAIN_ID'
+      field: 'CHAIN_ID',
+      get() {
+        const value = this.getDataValue('chainId');
+        return +value;
+      }
     },
     createdAt: {
       type: DataTypes.DATE,
diff --git a/backend/src/models/sponsorship-policy.ts b/backend/src/models/sponsorship-policy.ts
index a58ae9c..79c3f91 100644
--- a/backend/src/models/sponsorship-policy.ts
+++ b/backend/src/models/sponsorship-policy.ts
@@ -112,9 +112,13 @@ export function initializeSponsorshipPolicyModel(sequelize: Sequelize, schema: s
             field: 'IS_APPLICABLE_TO_ALL_NETWORKS'
         },
         enabledChains: {
-            type: DataTypes.ARRAY(DataTypes.INTEGER),
+            type: DataTypes.ARRAY(DataTypes.BIGINT),
             allowNull: true,
-            field: 'ENABLED_CHAINS'
+            field: 'ENABLED_CHAINS',
+            get() {
+                const value = this.getDataValue('enabledChains');
+                return value?.map((item: any) => +item);
+            }
         },
         supportedEPVersions: {
             type: DataTypes.ARRAY(DataTypes.STRING),
diff --git a/backend/src/repository/sponsorship-policy-repository.ts b/backend/src/repository/sponsorship-policy-repository.ts
index 10159b0..f2f4ac7 100644
--- a/backend/src/repository/sponsorship-policy-repository.ts
+++ b/backend/src/repository/sponsorship-policy-repository.ts
@@ -39,7 +39,7 @@ export class SponsorshipPolicyRepository {
                 ]
             }
         });
-        return result.map(apiKey => apiKey as SponsorshipPolicy);
+        return result.map(apiKey => apiKey.get() as SponsorshipPolicy);
     }
 
     // findAllEnabled
diff --git a/backend/src/routes/admin-routes.ts b/backend/src/routes/admin-routes.ts
index 6b6ded3..11ef7e9 100644
--- a/backend/src/routes/admin-routes.ts
+++ b/backend/src/routes/admin-routes.ts
@@ -107,14 +107,8 @@ const adminRoutes: FastifyPluginAsync = async (server) => {
       const privateKey = wallet.privateKey;
       const publicAddress = await wallet.getAddress();
 
-      request.log.info(`-----------headers---------- ${JSON.stringify(request.headers)}`);
-      request.log.info(`-----------hmac secret---------- ${server.config.HMAC_SECRET}`);
-      
-
       if(!unsafeMode) {
         const { 'x-signature': signature, 'x-timestamp': timestamp } = request.headers as IncomingHttpHeaders & AuthDto;
-        request.log.info(`-----------signature---------- ${signature}`);
-        request.log.info(`-----------timestamp---------- ${timestamp}`);
         
         if(!signature || !timestamp)
           return reply.code(ReturnCode.NOT_AUTHORIZED).send({ error: ErrorMessage.INVALID_SIGNATURE_OR_TIMESTAMP });
diff --git a/backend/src/utils/crypto.ts b/backend/src/utils/crypto.ts
index 4a26e21..a52ef3e 100644
--- a/backend/src/utils/crypto.ts
+++ b/backend/src/utils/crypto.ts
@@ -66,8 +66,6 @@ export async function decodeSafe(value: string, hmacSecret: string) {
 export function verifySignature(signature: string, data: string, timestamp: string, hmacSecret: string) {
   // unauthorize signature if signed before 10s or signed in future.
   const now = Date.now();
-  server.log.info(`-----------now---------- ${now}`);
-  server.log.info(`-----------hmacSecret---------- ${hmacSecret}`);
   if(
     now < parseInt(timestamp) ||
     now - parseInt(timestamp) > 10000
@@ -75,7 +73,5 @@ export function verifySignature(signature: string, data: string, timestamp: stri
     return false;
   }
   const computedSignature = createDigest(data + timestamp, 'hex', hmacSecret);
-  server.log.info(`-----------computedSignature----------${computedSignature}`);
-  server.log.info(`-----------signature----------${signature} ${computedSignature === signature}`);
   return signature === computedSignature;
 }