diff --git a/.github/actions/run-polkadot/action.yml b/.github/actions/run-polkadot/action.yml
index cbdce30..c2eea7e 100644
--- a/.github/actions/run-polkadot/action.yml
+++ b/.github/actions/run-polkadot/action.yml
@@ -41,6 +41,6 @@ runs:
         key: ${{ runner.os }}-${{ inputs.polkadot-version }}-${{ hashFiles('substrate-tip-bot/polkadot.e2e.patch') }}
     - name: Run a local Rococo node
       run: |
-        polkadot-sdk/target/release/polkadot --rpc-external --no-prometheus --no-telemetry --chain=rococo-dev --tmp --alice --execution Native --rpc-port 9902 &
+        polkadot-sdk/target/release/polkadot --rpc-external --no-prometheus --no-telemetry --chain=rococo-dev --tmp --alice --execution Native --unsafe-force-node-key-generation --rpc-port 9902 &
         until curl -s '127.0.0.1:9902'; do sleep 3; done
       shell: bash
diff --git a/.github/workflows/test-e2e.yml b/.github/workflows/test-e2e.yml
index 0fc2dec..f7db8dc 100644
--- a/.github/workflows/test-e2e.yml
+++ b/.github/workflows/test-e2e.yml
@@ -15,7 +15,7 @@ jobs:
       - name: Start a local Polkadot node
         uses: ./.github/actions/run-polkadot
         with:
-          polkadot-version: polkadot-v1.7.1
+          polkadot-version: polkadot-v1.13.0
       - name: Wait for the node
         run: |
           until curl -s '127.0.0.1:9902'; do sleep 3; done
diff --git a/package.json b/package.json
index ba690a6..04ca933 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
   "dependencies": {
     "@eng-automation/integrations": "^4.4.0",
     "@eng-automation/js": "^2.2.0",
-    "@polkadot/api": "^10.9.1",
+    "@polkadot/api": "^12.0.2",
     "@polkadot/util": "^12.3.2",
     "@polkadot/util-crypto": "^12.3.2",
     "concurrently": "^8.2.2",
diff --git a/src/tip-opengov.e2e.ts b/src/tip-opengov.e2e.ts
index baa4ad3..6ee7c91 100644
--- a/src/tip-opengov.e2e.ts
+++ b/src/tip-opengov.e2e.ts
@@ -7,6 +7,7 @@ all the way to completing the referendum.
 import "@polkadot/api-augment";
 import { until } from "@eng-automation/js";
 import { ApiPromise, Keyring, WsProvider } from "@polkadot/api";
+import type { SubmittableExtrinsic } from "@polkadot/api/types";
 import { KeyringPair } from "@polkadot/keyring/types";
 import { BN } from "@polkadot/util";
 import { cryptoWaitReady } from "@polkadot/util-crypto";
@@ -25,6 +26,22 @@ const treasuryAccount = "13UVJyLnbVp9RBZYFwFGyDvVd1y27Tt8tkntv6Q7JVPhFsTB"; // h
 
 const network = "localrococo";
 
+const signAndSend = (signer: KeyringPair, extrinsic: SubmittableExtrinsic<"promise">) =>
+  new Promise<void>(async (resolve, reject) => {
+    try {
+      await extrinsic.signAndSend(signer, { nonce: -1 }, (result) => {
+        if (result.isError) {
+          reject(result.status.toString());
+        }
+        if (result.isInBlock) {
+          resolve();
+        }
+      });
+    } catch (e) {
+      reject(e);
+    }
+  });
+
 describe("E2E opengov tip", () => {
   let state: State;
   let api: ApiPromise;
@@ -69,9 +86,7 @@ describe("E2E opengov tip", () => {
     alice = keyring.addFromUri("//Alice");
 
     // In some local dev chains, treasury is broke, so we fund it.
-    await api.tx.balances
-      .transferKeepAlive(treasuryAccount, new BN("10000000000000"))
-      .signAndSend(alice, { nonce: -1 });
+    await signAndSend(alice, api.tx.balances.transferKeepAlive(treasuryAccount, new BN("10000000000000")));
   });
 
   test("Small OpenGov tip", async () => {
@@ -90,10 +105,13 @@ describe("E2E opengov tip", () => {
     expect(result.success).toBeTruthy();
 
     // Alice votes "aye" on the referendum.
-    await api.tx.referenda.placeDecisionDeposit(referendumId).signAndSend(alice, { nonce: -1 });
-    await api.tx.convictionVoting
-      .vote(referendumId, { Standard: { balance: new BN(1_000_000), vote: { aye: true, conviction: 1 } } })
-      .signAndSend(alice, { nonce: -1 });
+    await signAndSend(alice, api.tx.referenda.placeDecisionDeposit(referendumId));
+    await signAndSend(
+      alice,
+      api.tx.convictionVoting.vote(referendumId, {
+        Standard: { balance: new BN(1_000_000), vote: { aye: true, conviction: 1 } },
+      }),
+    );
 
     // Waiting for the referendum voting, enactment, and treasury spend period.
     await until(async () => (await getUserBalance(tipRequest.contributor.account.address)).gtn(0), 5000, 50);
diff --git a/src/tip.integration.ts b/src/tip.integration.ts
index 39213ab..f7ab076 100644
--- a/src/tip.integration.ts
+++ b/src/tip.integration.ts
@@ -147,7 +147,7 @@ describe("tip", () => {
           throw new Error("Encoding the proposal failed.");
         }
         const { encodedProposal } = encodeProposalResult;
-        const nextFreeReferendumId = new BN(await api.query.referenda.referendumCount());
+        const nextFreeReferendumId = new BN((await api.query.referenda.referendumCount()).toNumber());
 
         // We surround our tip with two "decoys" to make sure that we find the proper one.
         await tipUser(state, tipRequest); // Will occupy nextFreeReferendumId
diff --git a/yarn.lock b/yarn.lock
index 3599e47..0626970 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1701,6 +1701,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@noble/curves@npm:^1.3.0":
+  version: 1.4.0
+  resolution: "@noble/curves@npm:1.4.0"
+  dependencies:
+    "@noble/hashes": "npm:1.4.0"
+  checksum: 10c0/31fbc370df91bcc5a920ca3f2ce69c8cf26dc94775a36124ed8a5a3faf0453badafd2ee4337061ffea1b43c623a90ee8b286a5a81604aaf9563bdad7ff795d18
+  languageName: node
+  linkType: hard
+
 "@noble/hashes@npm:1.3.1":
   version: 1.3.1
   resolution: "@noble/hashes@npm:1.3.1"
@@ -1708,6 +1717,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@noble/hashes@npm:1.4.0, @noble/hashes@npm:^1.3.1, @noble/hashes@npm:^1.3.3":
+  version: 1.4.0
+  resolution: "@noble/hashes@npm:1.4.0"
+  checksum: 10c0/8c3f005ee72e7b8f9cff756dfae1241485187254e3f743873e22073d63906863df5d4f13d441b7530ea614b7a093f0d889309f28b59850f33b66cb26a779a4a5
+  languageName: node
+  linkType: hard
+
 "@nodelib/fs.scandir@npm:2.1.5":
   version: 2.1.5
   resolution: "@nodelib/fs.scandir@npm:2.1.5"
@@ -2295,78 +2311,142 @@ __metadata:
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   linkType: hard
 
-"@polkadot/api-augment@npm:10.9.1":
-  version: 10.9.1
-  resolution: "@polkadot/api-augment@npm:10.9.1"
+"@polkadot-api/json-rpc-provider-proxy@npm:0.0.1":
+  version: 0.0.1
+  resolution: "@polkadot-api/json-rpc-provider-proxy@npm:0.0.1"
+  checksum: 10c0/2e18848c362af7bb1361873237d38e17e17442729954e5ca800d95dcf39ca4f77e24054eb36254dec6d0969df31e3968814019dc4acaa55584985d4f31186811
+  languageName: node
+  linkType: hard
+
+"@polkadot-api/json-rpc-provider@npm:0.0.1":
+  version: 0.0.1
+  resolution: "@polkadot-api/json-rpc-provider@npm:0.0.1"
+  checksum: 10c0/90dc86693e7ef742c50484f4374d4b4f0eb7b5f7f618cf96a3dfed866fd18edf19132fc750b2944e8300d83c5601343f3876cbe60cd6bb1086301361d682ebd8
+  languageName: node
+  linkType: hard
+
+"@polkadot-api/metadata-builders@npm:0.0.1":
+  version: 0.0.1
+  resolution: "@polkadot-api/metadata-builders@npm:0.0.1"
   dependencies:
-    "@polkadot/api-base": "npm:10.9.1"
-    "@polkadot/rpc-augment": "npm:10.9.1"
-    "@polkadot/types": "npm:10.9.1"
-    "@polkadot/types-augment": "npm:10.9.1"
-    "@polkadot/types-codec": "npm:10.9.1"
-    "@polkadot/util": "npm:^12.3.1"
-    tslib: "npm:^2.5.3"
-  checksum: 10c0/d3a0bf407b7ebd007e4b56b1dbe7a1a147f2ba37df45025e900228696af849c62119ba10f0b861b62c5fc6aba8abd615c0349ec595f257c94e7c428144894964
+    "@polkadot-api/substrate-bindings": "npm:0.0.1"
+    "@polkadot-api/utils": "npm:0.0.1"
+  checksum: 10c0/15cee1c05f61f324a72a8e81540297ffccd532d477233868cc6c8ef9c47ac6bcb174c686b2cb41336304d54b9b7a5cb1396cc482b97b78c1671c7316dad27839
+  languageName: node
+  linkType: hard
+
+"@polkadot-api/observable-client@npm:0.1.0":
+  version: 0.1.0
+  resolution: "@polkadot-api/observable-client@npm:0.1.0"
+  dependencies:
+    "@polkadot-api/metadata-builders": "npm:0.0.1"
+    "@polkadot-api/substrate-bindings": "npm:0.0.1"
+    "@polkadot-api/substrate-client": "npm:0.0.1"
+    "@polkadot-api/utils": "npm:0.0.1"
+  peerDependencies:
+    rxjs: ">=7.8.0"
+  checksum: 10c0/e2557d1875fc9a7fcfc919329ce6190ebea28b7f5482c40ff53941148ec183bc707c0887aa8c50eda1f7fd36c77f18ab84c1e4a1d65209131e351ba50f554735
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+"@polkadot-api/substrate-bindings@npm:0.0.1":
+  version: 0.0.1
+  resolution: "@polkadot-api/substrate-bindings@npm:0.0.1"
   dependencies:
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-    "@polkadot/types": "npm:10.9.1"
-    "@polkadot/util": "npm:^12.3.1"
+    "@noble/hashes": "npm:^1.3.1"
+    "@polkadot-api/utils": "npm:0.0.1"
+    "@scure/base": "npm:^1.1.1"
+    scale-ts: "npm:^1.6.0"
+  checksum: 10c0/1993706a4fb0a93ccdb1ac741a083f3015c26bba180df421cb8cf133e4bc00a222297a368358c5c103ca4229b87ae331dbde450edf98a893b43cfb3f94651e03
+  languageName: node
+  linkType: hard
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+"@polkadot-api/substrate-client@npm:0.0.1":
+  version: 0.0.1
+  resolution: "@polkadot-api/substrate-client@npm:0.0.1"
+  checksum: 10c0/92dbe76ea434c8ee2ac6c42be2003a1823e7b6d25955981a1410e3c9aab700fa7e4f0871c98cd3eea30ed4388b0ecaf4eaedad111240e17373704152c1faca98
+  languageName: node
+  linkType: hard
+
+"@polkadot-api/utils@npm:0.0.1":
+  version: 0.0.1
+  resolution: "@polkadot-api/utils@npm:0.0.1"
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+  languageName: node
+  linkType: hard
+
+"@polkadot/api-augment@npm:12.0.2":
+  version: 12.0.2
+  resolution: "@polkadot/api-augment@npm:12.0.2"
+  dependencies:
+    "@polkadot/api-base": "npm:12.0.2"
+    "@polkadot/rpc-augment": "npm:12.0.2"
+    "@polkadot/types": "npm:12.0.2"
+    "@polkadot/types-augment": "npm:12.0.2"
+    "@polkadot/types-codec": "npm:12.0.2"
+    "@polkadot/util": "npm:^12.6.2"
+    tslib: "npm:^2.6.2"
+  checksum: 10c0/762c3c4439d3640f96446ed0b189548aeaecdb82f9914d7f34a5a38df9eb01dd1fede6746efd55301015a80a38ce95c86a93353817cdcf7a740fb5aa9eb811f9
+  languageName: node
+  linkType: hard
+
+"@polkadot/api-base@npm:12.0.2":
+  version: 12.0.2
+  resolution: "@polkadot/api-base@npm:12.0.2"
+  dependencies:
+    "@polkadot/rpc-core": "npm:12.0.2"
+    "@polkadot/types": "npm:12.0.2"
+    "@polkadot/util": "npm:^12.6.2"
     rxjs: "npm:^7.8.1"
-    tslib: "npm:^2.5.3"
-  checksum: 10c0/1f078d58d6aa79d13cfc218d8c13fe741c85c47ca6600148f12c5628fd9852ab4147325c9790a745f89f9c79edae2d54002f51ef169f8ae8b1808b967b831fab
+    tslib: "npm:^2.6.2"
+  checksum: 10c0/ac16d1812bbb02fb747fa725e662024e994e89267aae0fa7c038dd9cb49d1185305d9f5c5cb0d25b8ca0526e9be1609fcd92d0c6bb2d4a96b9e51c396e6f853f
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-"@polkadot/api-derive@npm:10.9.1":
-  version: 10.9.1
-  resolution: "@polkadot/api-derive@npm:10.9.1"
+"@polkadot/api-derive@npm:12.0.2":
+  version: 12.0.2
+  resolution: "@polkadot/api-derive@npm:12.0.2"
   dependencies:
-    "@polkadot/api": "npm:10.9.1"
-    "@polkadot/api-augment": "npm:10.9.1"
-    "@polkadot/api-base": "npm:10.9.1"
-    "@polkadot/rpc-core": "npm:10.9.1"
-    "@polkadot/types": "npm:10.9.1"
-    "@polkadot/types-codec": "npm:10.9.1"
-    "@polkadot/util": "npm:^12.3.1"
-    "@polkadot/util-crypto": "npm:^12.3.1"
+    "@polkadot/api": "npm:12.0.2"
+    "@polkadot/api-augment": "npm:12.0.2"
+    "@polkadot/api-base": "npm:12.0.2"
+    "@polkadot/rpc-core": "npm:12.0.2"
+    "@polkadot/types": "npm:12.0.2"
+    "@polkadot/types-codec": "npm:12.0.2"
+    "@polkadot/util": "npm:^12.6.2"
+    "@polkadot/util-crypto": "npm:^12.6.2"
     rxjs: "npm:^7.8.1"
-    tslib: "npm:^2.5.3"
-  checksum: 10c0/d7ae1b37e4bf893e02c1c924f859d2e6a1aec3d4ccc120ce8210c93234210f133a67a1809684069ba4d7cdbbd90ab5324eeca9a34513381326dfd6f78b51443d
-  languageName: node
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-
-"@polkadot/api@npm:10.9.1, @polkadot/api@npm:^10.9.1":
-  version: 10.9.1
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-  dependencies:
-    "@polkadot/api-augment": "npm:10.9.1"
-    "@polkadot/api-base": "npm:10.9.1"
-    "@polkadot/api-derive": "npm:10.9.1"
-    "@polkadot/keyring": "npm:^12.3.1"
-    "@polkadot/rpc-augment": "npm:10.9.1"
-    "@polkadot/rpc-core": "npm:10.9.1"
-    "@polkadot/rpc-provider": "npm:10.9.1"
-    "@polkadot/types": "npm:10.9.1"
-    "@polkadot/types-augment": "npm:10.9.1"
-    "@polkadot/types-codec": "npm:10.9.1"
-    "@polkadot/types-create": "npm:10.9.1"
-    "@polkadot/types-known": "npm:10.9.1"
-    "@polkadot/util": "npm:^12.3.1"
-    "@polkadot/util-crypto": "npm:^12.3.1"
+    tslib: "npm:^2.6.2"
+  checksum: 10c0/13b28e2c3075eb59a4999c380abba743a0cd8df202643a4aadb6693b26f5a3625dfffd015acadd53cdeb89e52d04ecea62202b144576488ee599aff5b08e9141
+  languageName: node
+  linkType: hard
+
+"@polkadot/api@npm:12.0.2, @polkadot/api@npm:^12.0.2":
+  version: 12.0.2
+  resolution: "@polkadot/api@npm:12.0.2"
+  dependencies:
+    "@polkadot/api-augment": "npm:12.0.2"
+    "@polkadot/api-base": "npm:12.0.2"
+    "@polkadot/api-derive": "npm:12.0.2"
+    "@polkadot/keyring": "npm:^12.6.2"
+    "@polkadot/rpc-augment": "npm:12.0.2"
+    "@polkadot/rpc-core": "npm:12.0.2"
+    "@polkadot/rpc-provider": "npm:12.0.2"
+    "@polkadot/types": "npm:12.0.2"
+    "@polkadot/types-augment": "npm:12.0.2"
+    "@polkadot/types-codec": "npm:12.0.2"
+    "@polkadot/types-create": "npm:12.0.2"
+    "@polkadot/types-known": "npm:12.0.2"
+    "@polkadot/util": "npm:^12.6.2"
+    "@polkadot/util-crypto": "npm:^12.6.2"
     eventemitter3: "npm:^5.0.1"
     rxjs: "npm:^7.8.1"
-    tslib: "npm:^2.5.3"
-  checksum: 10c0/ec34908d953858e2b6dfeebcca22953c7a188562fc97be9aae3f0cb61eaff0e496c75fff7fdd6c767170cfecadce2cd46d1b5cd44081f7fb32cdd864468bd184
+    tslib: "npm:^2.6.2"
+  checksum: 10c0/a4ffb34246f5e20469b26af8f59176f81315fbcda431a1820e328e0fa048623b56aabbfd6fc63bce1892ce04f9b6d4640cfba9fda1407b4c7467edbbf444dcf0
   languageName: node
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-"@polkadot/keyring@npm:^12.3.1, @polkadot/keyring@npm:^12.3.2":
+"@polkadot/keyring@npm:^12.3.2":
   version: 12.3.2
   resolution: "@polkadot/keyring@npm:12.3.2"
   dependencies:
@@ -2380,7 +2460,21 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/networks@npm:12.3.2, @polkadot/networks@npm:^12.3.1":
+"@polkadot/keyring@npm:^12.6.2":
+  version: 12.6.2
+  resolution: "@polkadot/keyring@npm:12.6.2"
+  dependencies:
+    "@polkadot/util": "npm:12.6.2"
+    "@polkadot/util-crypto": "npm:12.6.2"
+    tslib: "npm:^2.6.2"
+  peerDependencies:
+    "@polkadot/util": 12.6.2
+    "@polkadot/util-crypto": 12.6.2
+  checksum: 10c0/16b198b072ff22cd9fb0281d1dc1e97a3939eccf268e5e2c9272e85ae90cb6212d248d6b76bf85359351d3d43fd9c8b6f951001485e0d2bcff35b675cb189f3d
+  languageName: node
+  linkType: hard
+
+"@polkadot/networks@npm:12.3.2":
   version: 12.3.2
   resolution: "@polkadot/networks@npm:12.3.2"
   dependencies:
@@ -2391,132 +2485,143 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/rpc-augment@npm:10.9.1":
-  version: 10.9.1
-  resolution: "@polkadot/rpc-augment@npm:10.9.1"
+"@polkadot/networks@npm:12.6.2, @polkadot/networks@npm:^12.6.2":
+  version: 12.6.2
+  resolution: "@polkadot/networks@npm:12.6.2"
   dependencies:
-    "@polkadot/rpc-core": "npm:10.9.1"
-    "@polkadot/types": "npm:10.9.1"
-    "@polkadot/types-codec": "npm:10.9.1"
-    "@polkadot/util": "npm:^12.3.1"
-    tslib: "npm:^2.5.3"
-  checksum: 10c0/54d5dddad57f977c35988a0ad75df355060163b32c782cde0c8ee4f7ea5f45a547edcab364a4ec1c74b898a96da5409de7ebd194f2d57ff82d8f6df90000bda1
+    "@polkadot/util": "npm:12.6.2"
+    "@substrate/ss58-registry": "npm:^1.44.0"
+    tslib: "npm:^2.6.2"
+  checksum: 10c0/44a482c46900058e6d5b25110cb5396382036057240cd4a8e0dae325fab54e689ec81bc43b047570581f14ce456b67310c05c1fe34c4b7f7d4e064f095f4c276
+  languageName: node
+  linkType: hard
+
+"@polkadot/rpc-augment@npm:12.0.2":
+  version: 12.0.2
+  resolution: "@polkadot/rpc-augment@npm:12.0.2"
+  dependencies:
+    "@polkadot/rpc-core": "npm:12.0.2"
+    "@polkadot/types": "npm:12.0.2"
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