diff --git a/example/package-lock.json b/example/package-lock.json
index 192d779..a62a82d 100644
--- a/example/package-lock.json
+++ b/example/package-lock.json
@@ -10,6 +10,7 @@
       "dependencies": {
         "@mantine/core": "^7.11.2",
         "@mantine/hooks": "^7.11.2",
+        "@sats-connect/core": "^0.4.2-5220ac4",
         "@stacks/common": "^7.0.2",
         "@stacks/stacking": "^7.0.2",
         "@stacks/transactions": "^7.0.2",
@@ -1416,6 +1417,41 @@
         "win32"
       ]
     },
+    "node_modules/@sats-connect/core": {
+      "version": "0.4.2-5220ac4",
+      "resolved": "https://registry.npmjs.org/@sats-connect/core/-/core-0.4.2-5220ac4.tgz",
+      "integrity": "sha512-iwrWagHyg2UOjH9SAQHeALyMMmvqd8lLkdiv+PeW0jn+wKRY75DqcmDvq1GTqILd7ZaeDp3Gf/czFTf6woeSbA==",
+      "dependencies": {
+        "axios": "1.7.7",
+        "bitcoin-address-validation": "2.2.3",
+        "buffer": "6.0.3",
+        "jsontokens": "4.0.1",
+        "valibot": "0.42.1"
+      }
+    },
+    "node_modules/@sats-connect/core/node_modules/buffer": {
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-6.0.3.tgz",
+      "integrity": "sha512-FTiCpNxtwiZZHEZbcbTIcZjERVICn9yq/pDFkTl95/AxzD1naBctN7YO68riM/gLSDY7sdrMby8hofADYuuqOA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "dependencies": {
+        "base64-js": "^1.3.1",
+        "ieee754": "^1.2.1"
+      }
+    },
     "node_modules/@scure/base": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/@scure/base/-/base-1.1.1.tgz",
@@ -2095,6 +2131,11 @@
         "util": "^0.12.5"
       }
     },
+    "node_modules/asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q=="
+    },
     "node_modules/available-typed-arrays": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/available-typed-arrays/-/available-typed-arrays-1.0.7.tgz",
@@ -2109,6 +2150,16 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/axios": {
+      "version": "1.7.7",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-1.7.7.tgz",
+      "integrity": "sha512-S4kL7XrjgBmvdGut0sN3yJxqYzrDOnivkBiN0OFs6hLiUam3UPvswUo0kqGyhqUZGEOytHyumEdXsAkgCOUf3Q==",
+      "dependencies": {
+        "follow-redirects": "^1.15.6",
+        "form-data": "^4.0.0",
+        "proxy-from-env": "^1.1.0"
+      }
+    },
     "node_modules/balanced-match": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
@@ -2119,6 +2170,14 @@
       "resolved": "https://registry.npmjs.org/base-x/-/base-x-4.0.0.tgz",
       "integrity": "sha512-FuwxlW4H5kh37X/oW59pwTzzTKRzfrrQwhmyspRM7swOEZcHtDZSCt45U6oKgtuFE+WYPblePMVIPR4RZrh/hw=="
     },
+    "node_modules/base58-js": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/base58-js/-/base58-js-1.0.5.tgz",
+      "integrity": "sha512-LkkAPP8Zu+c0SVNRTRVDyMfKVORThX+rCViget00xdgLRrKkClCTz1T7cIrpr69ShwV5XJuuoZvMvJ43yURwkA==",
+      "engines": {
+        "node": ">= 8"
+      }
+    },
     "node_modules/base64-js": {
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
@@ -2181,6 +2240,16 @@
         "safe-buffer": "^5.0.1"
       }
     },
+    "node_modules/bitcoin-address-validation": {
+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/bitcoin-address-validation/-/bitcoin-address-validation-2.2.3.tgz",
+      "integrity": "sha512-1uGCGl26Ye8JG5qcExtFLQfuib6qEZWNDo1ZlLlwp/z7ygUFby3IxolgEfgMGaC+LG9csbVASLcH8fRLv7DIOg==",
+      "dependencies": {
+        "base58-js": "^1.0.0",
+        "bech32": "^2.0.0",
+        "sha256-uint8array": "^0.10.3"
+      }
+    },
     "node_modules/bitcoinjs-lib": {
       "version": "6.1.6",
       "resolved": "https://registry.npmjs.org/bitcoinjs-lib/-/bitcoinjs-lib-6.1.6.tgz",
@@ -2701,6 +2770,17 @@
       "integrity": "sha512-72fSenhMw2HZMTVHeCA9KCmpEIbzWiQsjN+BHcBbS9vr1mtt+vJjPdksIBNUmKAW8TFUDPJK5SUU3QhE9NEXDw==",
       "dev": true
     },
+    "node_modules/combined-stream": {
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
+      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
+      "dependencies": {
+        "delayed-stream": "~1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
     "node_modules/concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
@@ -2950,6 +3030,14 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/delayed-stream": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
+      "integrity": "sha512-ZySD7Nf91aLB0RxL4KGrKHBXl7Eds1DAmEdcoVawXnLD7SDhpNgtuII2aAkg7a7QS41jxPSZ17p4VdGnMHk3MQ==",
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
     "node_modules/des.js": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/des.js/-/des.js-1.1.0.tgz",
@@ -3751,6 +3839,25 @@
       "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.3.1.tgz",
       "integrity": "sha512-X8cqMLLie7KsNUDSdzeN8FYK9rEt4Dt67OsG/DNGnYTSDBG4uFAJFBnUeiV+zCVAvwFy56IjM9sH51jVaEhNxw=="
     },
+    "node_modules/follow-redirects": {
+      "version": "1.15.9",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.15.9.tgz",
+      "integrity": "sha512-gew4GsXizNgdoRyqmyfMHyAmXsZDk6mHkSxZFCzW9gwlbtOW44CDtYavM+y+72qD/Vq2l550kMF52DT8fOLJqQ==",
+      "funding": [
+        {
+          "type": "individual",
+          "url": "https://github.com/sponsors/RubenVerborgh"
+        }
+      ],
+      "engines": {
+        "node": ">=4.0"
+      },
+      "peerDependenciesMeta": {
+        "debug": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/for-each": {
       "version": "0.3.3",
       "resolved": "https://registry.npmjs.org/for-each/-/for-each-0.3.3.tgz",
@@ -3759,6 +3866,19 @@
         "is-callable": "^1.1.3"
       }
     },
+    "node_modules/form-data": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.1.tgz",
+      "integrity": "sha512-tzN8e4TX8+kkxGPK8D5u0FNmjPUjw3lwC9lSLxxoB/+GtsJG91CO8bSWy73APlgAZzZbXEYZJuxjkHH2w+Ezhw==",
+      "dependencies": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.8",
+        "mime-types": "^2.1.12"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
@@ -4090,7 +4210,6 @@
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
       "integrity": "sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA==",
-      "dev": true,
       "funding": [
         {
           "type": "github",
@@ -4615,6 +4734,16 @@
         "node": ">=6"
       }
     },
+    "node_modules/jsontokens": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/jsontokens/-/jsontokens-4.0.1.tgz",
+      "integrity": "sha512-+MO415LEN6M+3FGsRz4wU20g7N2JA+2j9d9+pGaNJHviG4L8N0qzavGyENw6fJqsq9CcrHOIL6iWX5yeTZ86+Q==",
+      "dependencies": {
+        "@noble/hashes": "^1.1.2",
+        "@noble/secp256k1": "^1.6.3",
+        "base64-js": "^1.5.1"
+      }
+    },
     "node_modules/jsx-ast-utils": {
       "version": "3.3.5",
       "resolved": "https://registry.npmjs.org/jsx-ast-utils/-/jsx-ast-utils-3.3.5.tgz",
@@ -4747,6 +4876,25 @@
         "miller-rabin": "bin/miller-rabin"
       }
     },
+    "node_modules/mime-db": {
+      "version": "1.52.0",
+      "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.52.0.tgz",
+      "integrity": "sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg==",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/mime-types": {
+      "version": "2.1.35",
+      "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.35.tgz",
+      "integrity": "sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==",
+      "dependencies": {
+        "mime-db": "1.52.0"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/minimalistic-assert": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/minimalistic-assert/-/minimalistic-assert-1.0.1.tgz",
@@ -5421,6 +5569,11 @@
         "react-is": "^16.13.1"
       }
     },
+    "node_modules/proxy-from-env": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/proxy-from-env/-/proxy-from-env-1.1.0.tgz",
+      "integrity": "sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg=="
+    },
     "node_modules/public-encrypt": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/public-encrypt/-/public-encrypt-4.0.3.tgz",
@@ -5981,6 +6134,11 @@
         "sha.js": "bin.js"
       }
     },
+    "node_modules/sha256-uint8array": {
+      "version": "0.10.7",
+      "resolved": "https://registry.npmjs.org/sha256-uint8array/-/sha256-uint8array-0.10.7.tgz",
+      "integrity": "sha512-1Q6JQU4tX9NqsDGodej6pkrUVQVNapLZnvkwIhddH/JqzBZF1fSaxSWNY6sziXBE8aEa2twtGkXUrwzGeZCMpQ=="
+    },
     "node_modules/shallowequal": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/shallowequal/-/shallowequal-1.1.0.tgz",
@@ -6431,7 +6589,7 @@
       "version": "5.5.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.5.3.tgz",
       "integrity": "sha512-/hreyEujaB0w76zKo6717l3L0o/qEUtRgdvUBvlkhoWeOVMjMuHNHk0BRBzikzuGDqNmPQbg5ifMEqsHLiIUcQ==",
-      "dev": true,
+      "devOptional": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -6612,6 +6770,19 @@
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw=="
     },
+    "node_modules/valibot": {
+      "version": "0.42.1",
+      "resolved": "https://registry.npmjs.org/valibot/-/valibot-0.42.1.tgz",
+      "integrity": "sha512-3keXV29Ar5b//Hqi4MbSdV7lfVp6zuYLZuA9V1PvQUsXqogr+u5lvLPLk3A4f74VUXDnf/JfWMN6sB+koJ/FFw==",
+      "peerDependencies": {
+        "typescript": ">=5"
+      },
+      "peerDependenciesMeta": {
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/varuint-bitcoin": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/varuint-bitcoin/-/varuint-bitcoin-1.1.2.tgz",
diff --git a/example/src/components/stacks/SignTransactions/mutationFunction.ts b/example/src/components/stacks/SignTransactions/mutationFunction.ts
index d35d5a7..7c2188e 100644
--- a/example/src/components/stacks/SignTransactions/mutationFunction.ts
+++ b/example/src/components/stacks/SignTransactions/mutationFunction.ts
@@ -6,6 +6,7 @@ import {
   makeUnsignedContractDeploy,
   makeUnsignedSTXTokenTransfer,
   noneCV,
+  StacksTransactionWire,
   standardPrincipalCV,
   uintCV,
 } from '@stacks/transactions';
@@ -40,6 +41,14 @@ export interface MutationFnArgs {
   publicKey: string;
 }
 
+function getLastUsedNonce(transactions: StacksTransactionWire[]) {
+  const lastTransaction = transactions.at(-1);
+
+  if (!lastTransaction) return undefined;
+
+  return lastTransaction.auth.spendingCondition.nonce + 1n;
+}
+
 export async function mutationFunction({
   isPoolAllowContractSelected,
   isPoolDelegateStacksSelected,
@@ -48,7 +57,7 @@ export async function mutationFunction({
   broadcast,
   publicKey,
 }: MutationFnArgs) {
-  const transactions: string[] = [];
+  const transactions: StacksTransactionWire[] = [];
 
   if (isPoolAllowContractSelected) {
     const transaction = await makeUnsignedContractCall({
@@ -57,8 +66,9 @@ export async function mutationFunction({
       functionName: 'allow-contract-caller',
       functionArgs: [contractPrincipalCV(poolContractAddress, poolContractName), noneCV()],
       publicKey,
+      ...(getLastUsedNonce(transactions) && { nonce: getLastUsedNonce(transactions) }),
     });
-    transactions.push(transaction.serialize());
+    transactions.push(transaction);
   }
 
   if (isPoolDelegateStacksSelected) {
@@ -67,7 +77,7 @@ export async function mutationFunction({
       contractName: poolContractName,
       functionName: 'delegate-stx',
       functionArgs: [
-        uintCV(1234567890),
+        uintCV(101_000_000),
         standardPrincipalCV(poolAdminStacksAddress),
         noneCV(),
         noneCV(),
@@ -75,8 +85,9 @@ export async function mutationFunction({
         noneCV(),
       ],
       publicKey,
+      ...(getLastUsedNonce(transactions) && { nonce: getLastUsedNonce(transactions) }),
     });
-    transactions.push(transaction.serialize());
+    transactions.push(transaction);
   }
 
   if (isContractDeploySelected) {
@@ -85,8 +96,9 @@ export async function mutationFunction({
       contractName: `hello-world-${now}`,
       codeBody: helloWorldContractBody,
       publicKey,
+      ...(getLastUsedNonce(transactions) && { nonce: getLastUsedNonce(transactions) }),
     });
-    transactions.push(transaction.serialize());
+    transactions.push(transaction);
   }
 
   if (isTokenTransferSelected) {
@@ -94,12 +106,13 @@ export async function mutationFunction({
       recipient: 'SP1VYV2JBF1QPNDSKHBZRAWRC4KQXP8ZSSRNKPJE4', // acc 4
       amount: '100000', // 0.1 STX
       publicKey,
+      ...(getLastUsedNonce(transactions) && { nonce: getLastUsedNonce(transactions) }),
     });
-    transactions.push(transaction.serialize());
+    transactions.push(transaction);
   }
 
   const res = await request('stx_signTransactions', {
-    transactions,
+    transactions: transactions.map((t) => t.serialize()),
     broadcast,
   });
 
diff --git a/package-lock.json b/package-lock.json
index 62c58f5..eaa6f20 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "3.0.1",
       "license": "ISC",
       "dependencies": {
-        "@sats-connect/core": "0.4.1",
+        "@sats-connect/core": "^0.4.2-5220ac4",
         "@sats-connect/make-default-provider-config": "0.0.10",
         "@sats-connect/ui": "0.0.7"
       },
@@ -1716,9 +1716,9 @@
       ]
     },
     "node_modules/@sats-connect/core": {
-      "version": "0.4.1",
-      "resolved": "https://registry.npmjs.org/@sats-connect/core/-/core-0.4.1.tgz",
-      "integrity": "sha512-//0ge/FbKQZdhfFBR7LKdJxpzVB+bGfqHwkjHl0EX3QwvAu8n0dSoUZlym43+KB7gy0rgv1+ECFrOCeYGpGFgA==",
+      "version": "0.4.2-5220ac4",
+      "resolved": "https://registry.npmjs.org/@sats-connect/core/-/core-0.4.2-5220ac4.tgz",
+      "integrity": "sha512-iwrWagHyg2UOjH9SAQHeALyMMmvqd8lLkdiv+PeW0jn+wKRY75DqcmDvq1GTqILd7ZaeDp3Gf/czFTf6woeSbA==",
       "dependencies": {
         "axios": "1.7.7",
         "bitcoin-address-validation": "2.2.3",
diff --git a/package.json b/package.json
index 74a862a..4bae960 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     ]
   },
   "dependencies": {
-    "@sats-connect/core": "0.4.1",
+    "@sats-connect/core": "^0.4.2-5220ac4",
     "@sats-connect/make-default-provider-config": "0.0.10",
     "@sats-connect/ui": "0.0.7"
   },