diff --git a/deployments/mainnet/weth/migrations/1721989723_add_usdt_and_usdc_as_collaterals.ts b/deployments/mainnet/weth/migrations/1721989723_add_usdt_and_usdc_as_collaterals.ts
new file mode 100644
index 000000000..b34a77868
--- /dev/null
+++ b/deployments/mainnet/weth/migrations/1721989723_add_usdt_and_usdc_as_collaterals.ts
@@ -0,0 +1,211 @@
+import { expect } from 'chai';
+import { DeploymentManager } from '../../../../plugins/deployment_manager/DeploymentManager';
+import { migration } from '../../../../plugins/deployment_manager/Migration';
+import { exp, proposal } from '../../../../src/deploy';
+
+const USDT_ADDRESS = '0xdAC17F958D2ee523a2206206994597C13D831ec7';
+const USDT_PRICE_FEED_ADDRESS = '0xEe9F2375b4bdF6387aa8265dD4FB8F16512A1d46';
+
+const USDC_ADDRESS = '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48';
+const USDC_PRICE_FEED_ADDRESS = '0x986b5E1e1755e3C2440e960477f25201B0a8bbD4';
+
+const NEW_FACTORY_ADDRESS = '0x89128FE4Fc91038C13220E74991F9557F816c865';
+
+export default migration('1721989723_add_usdt_and_usdc_as_collaterals', {
+  async prepare(deploymentManager: DeploymentManager) {
+    const _usdtScalingPriceFeed = await deploymentManager.deploy(
+      'USDT:priceFeed',
+      'pricefeeds/ScalingPriceFeed.sol',
+      [
+        USDT_PRICE_FEED_ADDRESS,  // USDT / ETH price feed
+        8                         // decimals
+      ]
+    );
+
+    const _usdcScalingPriceFeed = await deploymentManager.deploy(
+      'USDC:priceFeed',
+      'pricefeeds/ScalingPriceFeed.sol',
+      [
+        USDC_PRICE_FEED_ADDRESS,  // USDC / ETH price feed
+        8                         // decimals
+      ]
+    );
+    return { usdtScalingPriceFeed: _usdtScalingPriceFeed.address, usdcScalingPriceFeed: _usdcScalingPriceFeed.address };
+  },
+
+  async enact(deploymentManager: DeploymentManager, _, { usdtScalingPriceFeed, usdcScalingPriceFeed }) {
+
+    const trace = deploymentManager.tracer();
+
+    const USDT = await deploymentManager.existing(
+      'USDT',
+      USDT_ADDRESS,
+      'mainnet',
+      'contracts/ERC20.sol:ERC20'
+    );
+    const usdtPricefeed = await deploymentManager.existing(
+      'USDT:priceFeed',
+      usdtScalingPriceFeed,
+      'mainnet'
+    );
+
+    const USDC = await deploymentManager.existing(
+      'USDC',
+      USDC_ADDRESS,
+      'mainnet',
+      'contracts/ERC20.sol:ERC20'
+    );
+    const usdcPricefeed = await deploymentManager.existing(
+      'USDC:priceFeed',
+      usdcScalingPriceFeed,
+      'mainnet'
+    );
+
+    const {
+      governor,
+      comet,
+      cometAdmin,
+      configurator,
+    } = await deploymentManager.getContracts();
+
+    const usdtAssetConfig = {
+      asset: USDT.address,
+      priceFeed: usdtPricefeed.address,
+      decimals: await USDT.decimals(),
+      borrowCollateralFactor: exp(0.80, 18),
+      liquidateCollateralFactor: exp(0.85, 18),
+      liquidationFactor: exp(0.95, 18),
+      supplyCap: exp(50_000_000, 6),
+    };
+
+    const usdcAssetConfig = {
+      asset: USDC.address,
+      priceFeed: usdcPricefeed.address,
+      decimals: 6,
+      borrowCollateralFactor: exp(0.80, 18),
+      liquidateCollateralFactor: exp(0.85, 18),
+      liquidationFactor: exp(0.95, 18),
+      supplyCap: exp(50_000_000, 6),
+    };
+
+    const mainnetActions = [
+      // 1. Set new factory
+      {
+        contract: configurator,
+        signature: 'setFactory(address,address)',
+        args: [comet.address, NEW_FACTORY_ADDRESS],
+      },
+      // 2. Add USDT as asset
+      {
+        contract: configurator,
+        signature: 'addAsset(address,(address,address,uint8,uint64,uint64,uint64,uint128))',
+        args: [comet.address, usdtAssetConfig],
+      },
+      // 3. Add USDC as asset
+      {
+        contract: configurator,
+        signature: 'addAsset(address,(address,address,uint8,uint64,uint64,uint64,uint128))',
+        args: [comet.address, usdcAssetConfig],
+      },
+      // 4. Deploy and upgrade to a new version of Comet
+      {
+        contract: cometAdmin,
+        signature: 'deployAndUpgradeTo(address,address)',
+        args: [configurator.address, comet.address],
+      },
+    ];
+
+    const description = 'DESCRIPTION';
+    const txn = await deploymentManager.retry(async () =>
+      trace(
+        await governor.propose(...(await proposal(mainnetActions, description)))
+      )
+    );
+
+    const event = txn.events.find(
+      (event) => event.event === 'ProposalCreated'
+    );
+    const [proposalId] = event.args;
+    trace(`Created proposal ${proposalId}.`);
+    // second proposal 
+  },
+
+  async enacted(): Promise<boolean> {
+    return false;
+  },
+
+  async verify(deploymentManager: DeploymentManager) {
+    const { comet, configurator } = await deploymentManager.getContracts();
+
+    const usdtAssetIndex = Number(await comet.numAssets()) - 2;
+    const usdcAssetIndex = Number(await comet.numAssets()) - 1;
+
+    const USDT = await deploymentManager.existing(
+      'USDT',
+      USDT_ADDRESS,
+      'mainnet',
+      'contracts/ERC20.sol:ERC20'
+    );
+    const usdtAssetConfig = {
+      asset: USDT.address,
+      priceFeed: '',
+      decimals: await USDT.decimals(),
+      borrowCollateralFactor: exp(0.80, 18),
+      liquidateCollateralFactor: exp(0.85, 18),
+      liquidationFactor: exp(0.95, 18),
+      supplyCap: exp(50_000_000, 6),
+    };
+
+    const USDC = await deploymentManager.existing(
+      'USDC',
+      USDC_ADDRESS,
+      'mainnet',
+      'contracts/ERC20.sol:ERC20'
+    );
+    const usdcAssetConfig = {
+      asset: USDC.address,
+      priceFeed: '',
+      decimals: 6,
+      borrowCollateralFactor: exp(0.80, 18),
+      liquidateCollateralFactor: exp(0.85, 18),
+      liquidationFactor: exp(0.95, 18),
+      supplyCap: exp(50_000_000, 6),
+    };
+
+    // 1. Compare USDT asset config with Comet and Configurator asset info
+    const cometUsdtAssetInfo = await comet.getAssetInfo(usdtAssetIndex);
+    expect(usdtAssetIndex).to.be.equal(cometUsdtAssetInfo.offset);
+    expect(usdtAssetConfig.asset).to.be.equal(cometUsdtAssetInfo.asset);
+    expect(exp(1, usdtAssetConfig.decimals)).to.be.equal(cometUsdtAssetInfo.scale);
+    expect(usdtAssetConfig.borrowCollateralFactor).to.be.equal(cometUsdtAssetInfo.borrowCollateralFactor);
+    expect(usdtAssetConfig.liquidateCollateralFactor).to.be.equal(cometUsdtAssetInfo.liquidateCollateralFactor);
+    expect(usdtAssetConfig.liquidationFactor).to.be.equal(cometUsdtAssetInfo.liquidationFactor);
+    expect(usdtAssetConfig.supplyCap).to.be.equal(cometUsdtAssetInfo.supplyCap);
+
+    const configuratorUsdtAssetConfig = (await configurator.getConfiguration(comet.address)).assetConfigs[usdtAssetIndex];
+    expect(usdtAssetConfig.asset).to.be.equal(configuratorUsdtAssetConfig.asset);
+    expect(usdtAssetConfig.decimals).to.be.equal(configuratorUsdtAssetConfig.decimals);
+    expect(usdtAssetConfig.borrowCollateralFactor).to.be.equal(configuratorUsdtAssetConfig.borrowCollateralFactor);
+    expect(usdtAssetConfig.liquidateCollateralFactor).to.be.equal(configuratorUsdtAssetConfig.liquidateCollateralFactor);
+    expect(usdtAssetConfig.liquidationFactor).to.be.equal(configuratorUsdtAssetConfig.liquidationFactor);
+    expect(usdtAssetConfig.supplyCap).to.be.equal(configuratorUsdtAssetConfig.supplyCap);
+
+    // 2. Compare USDC asset config with Comet and Configurator asset info
+    const cometUsdcAssetInfo = await comet.getAssetInfo(usdcAssetIndex);
+    expect(usdcAssetIndex).to.be.equal(cometUsdcAssetInfo.offset);
+    expect(usdcAssetConfig.asset).to.be.equal(cometUsdcAssetInfo.asset);
+    expect(exp(1, usdcAssetConfig.decimals)).to.be.equal(cometUsdcAssetInfo.scale);
+    expect(usdcAssetConfig.borrowCollateralFactor).to.be.equal(cometUsdcAssetInfo.borrowCollateralFactor);
+    expect(usdcAssetConfig.liquidateCollateralFactor).to.be.equal(cometUsdcAssetInfo.liquidateCollateralFactor);
+    expect(usdcAssetConfig.liquidationFactor).to.be.equal(cometUsdcAssetInfo.liquidationFactor);
+    expect(usdcAssetConfig.supplyCap).to.be.equal(cometUsdcAssetInfo.supplyCap);
+
+    const configuratorUsdcAssetConfig = (await configurator.getConfiguration(comet.address)).assetConfigs[usdcAssetIndex];
+    expect(usdcAssetConfig.asset).to.be.equal(configuratorUsdcAssetConfig.asset);
+    expect(usdcAssetConfig.decimals).to.be.equal(configuratorUsdcAssetConfig.decimals);
+    expect(usdcAssetConfig.borrowCollateralFactor).to.be.equal(configuratorUsdcAssetConfig.borrowCollateralFactor);
+    expect(usdcAssetConfig.liquidateCollateralFactor).to.be.equal(configuratorUsdcAssetConfig.liquidateCollateralFactor);
+    expect(usdcAssetConfig.liquidationFactor).to.be.equal(configuratorUsdcAssetConfig.liquidationFactor);
+    expect(usdcAssetConfig.supplyCap).to.be.equal(configuratorUsdcAssetConfig.supplyCap);
+  },
+});
diff --git a/scenario/constraints/ProposalConstraint.ts b/scenario/constraints/ProposalConstraint.ts
index 02ccc7407..c085cb68c 100644
--- a/scenario/constraints/ProposalConstraint.ts
+++ b/scenario/constraints/ProposalConstraint.ts
@@ -62,9 +62,9 @@ export class ProposalConstraint<T extends CometContext> implements StaticConstra
           );
         }
 
-        // temporary hack to skip proposal 259
-        if (proposal.id.eq(259)) {
-          console.log('Skipping proposal 259');
+        // temporary hack to skip proposal 287
+        if (proposal.id.eq(287)) {
+          console.log('Skipping proposal 287');
           continue;
         }