diff --git a/hardhat.config.ts b/hardhat.config.ts
index c682e9ff..1147be70 100644
--- a/hardhat.config.ts
+++ b/hardhat.config.ts
@@ -110,6 +110,14 @@ export default {
       ...sharedNetworkConfig,
       url: `https://linea-goerli.infura.io/v3/${INFURA_KEY}`,
     },
+    core: {
+      ...sharedNetworkConfig,
+      url: "https://rpc.coredao.org",
+    },
+    coreTestnet: {
+      ...sharedNetworkConfig,
+      url: "https://rpc.test.btcs.network",
+    },
   },
   namedAccounts: {
     deployer: 0,
@@ -119,5 +127,23 @@ export default {
   },
   etherscan: {
     apiKey: ETHERSCAN_API_KEY,
+    customChains: [
+      {
+        network: "coreTestnet",
+        chainId: 1115,
+        urls: {
+          apiURL: "https://api.test.btcs.network/api",
+          browserURL: "https://scan.test.btcs.network/",
+        },
+      },
+      {
+        network: "core",
+        chainId: 1116,
+        urls: {
+          apiURL: "https://openapi.coredao.org/api",
+          browserURL: "https://scan.coredao.org/",
+        },
+      },
+    ],
   },
 };
diff --git a/sdk/contracts.ts b/sdk/contracts.ts
index 5a429112..49e75c9b 100644
--- a/sdk/contracts.ts
+++ b/sdk/contracts.ts
@@ -53,6 +53,8 @@ export enum SupportedNetworks {
   HardhatNetwork = 31337,
   LineaGoerli = 59140,
   Sepolia = 11155111,
+  CoreTestnet = 1115,
+  Core = 1116,
 }
 
 // const canonicalMasterCopyAddress = (contract: KnownContracts) => {
@@ -215,6 +217,18 @@ export const ContractVersions: Record<
   },
   [SupportedNetworks.LineaGoerli]: CanonicalAddresses,
   [SupportedNetworks.Sepolia]: CanonicalAddresses,
+  [SupportedNetworks.CoreTestnet]: {
+    ...CanonicalAddresses,
+    [KnownContracts.OPTIMISTIC_GOVERNOR]: {
+      "1.2.0": "0xD43463Fadd73373bE260b67F5825274F4403dAF0",
+    },
+  },
+  [SupportedNetworks.Core]: {
+    ...CanonicalAddresses,
+    [KnownContracts.OPTIMISTIC_GOVERNOR]: {
+      "1.2.0": "0x596Fd6A5A185c67aBD1c845b39f593fBA9C233aa",
+    },
+  },
 };
 
 /** Addresses of the head versions of all contracts */
diff --git a/sdk/factory/mastercopyDeployer.ts b/sdk/factory/mastercopyDeployer.ts
index 3ebef99a..e27634ff 100644
--- a/sdk/factory/mastercopyDeployer.ts
+++ b/sdk/factory/mastercopyDeployer.ts
@@ -106,7 +106,7 @@ export const deployMastercopyWithInitData = async (
   const initCodeHash = keccak256(initCode);
 
   const computedTargetAddress = getCreate2Address(
-    await singletonFactory.address(),
+    await singletonFactory.getAddress(),
     salt,
     initCodeHash
   );
diff --git a/sdk/factory/singletonFactory.ts b/sdk/factory/singletonFactory.ts
index 4531356d..e3e6bb86 100644
--- a/sdk/factory/singletonFactory.ts
+++ b/sdk/factory/singletonFactory.ts
@@ -33,10 +33,12 @@ export const getSingletonFactory = async (
       "Singleton factory is not deployed on this chain. Deploying singleton factory..."
     );
     // fund the singleton factory deployer account
-    await signer.sendTransaction({
-      to: singletonDeployer,
-      value: parseEther("0.0247"),
-    });
+    await (
+      await signer.sendTransaction({
+        to: singletonDeployer,
+        value: parseEther("0.0247"),
+      })
+    ).wait();
 
     // deploy the singleton factory
     await (
diff --git a/tasks/deploy-replay.ts b/tasks/deploy-replay.ts
index 772026fe..d5b6ea41 100644
--- a/tasks/deploy-replay.ts
+++ b/tasks/deploy-replay.ts
@@ -17,7 +17,7 @@ export const deploy = async (_: unknown, hre: HardhatRuntimeEnvironment) => {
   console.log(`\n\x1B[4m\x1B[1m${hre.network.name}\x1B[0m`);
 
   const [deployer] = await hre.ethers.getSigners();
-  const signer = hre.ethers.provider.getSigner(deployer.address);
+  const signer = await hre.ethers.provider.getSigner(deployer.address);
   for (let index = 0; index < contracts.length; index++) {
     const initData: InitData | undefined = MasterCopyInitData[contracts[index]];
 
diff --git a/tasks/singleton-deployment.ts b/tasks/singleton-deployment.ts
index 5e28fde0..46697789 100644
--- a/tasks/singleton-deployment.ts
+++ b/tasks/singleton-deployment.ts
@@ -16,7 +16,7 @@ export const deploy = async (_: unknown, hre: HardhatRuntimeEnvironment) => {
   }
 
   const [deployer] = await hre.ethers.getSigners();
-  await deployModuleFactory(hre.ethers.provider.getSigner(deployer.address));
+  await deployModuleFactory(await hre.ethers.provider.getSigner(deployer.address));
 };
 
 task(