diff --git a/.changeset/tough-boxes-flash.md b/.changeset/tough-boxes-flash.md
new file mode 100644
index 000000000000..85a24d45d2e4
--- /dev/null
+++ b/.changeset/tough-boxes-flash.md
@@ -0,0 +1,5 @@
+---
+"@ledgerhq/coin-polkadot": minor
+---
+
+Update lockedbalance retrieval polkadot
diff --git a/libs/coin-polkadot/src/api/sidecar.ts b/libs/coin-polkadot/src/api/sidecar.ts
index 6d55dd5cb4c5..756f7cd0f35f 100644
--- a/libs/coin-polkadot/src/api/sidecar.ts
+++ b/libs/coin-polkadot/src/api/sidecar.ts
@@ -419,7 +419,7 @@ const getBalances = (network: NetworkRequestCall) => async (addr: string) => {
     balance,
     spendableBalance,
     nonce: Number(balanceInfo.nonce),
-    lockedBalance: new BigNumber(balanceInfo.miscFrozen),
+    lockedBalance: new BigNumber(totalLocked),
   };
 };
 
diff --git a/libs/coin-polkadot/src/api/sidecar.unit.test.ts b/libs/coin-polkadot/src/api/sidecar.unit.test.ts
new file mode 100644
index 000000000000..fa21b7799275
--- /dev/null
+++ b/libs/coin-polkadot/src/api/sidecar.unit.test.ts
@@ -0,0 +1,48 @@
+import BigNumber from "bignumber.js";
+import { getAccount } from "./sidecar";
+
+const networkApiMock = jest.fn();
+
+describe("getAccount", () => {
+  it("should estimate lockedBalance correctly with 1 locked balance type", async () => {
+    const lockedBalanceFn = getAccount(networkApiMock, jest.fn());
+    networkApiMock.mockResolvedValue({
+      data: {
+        locks: [
+          {
+            amount: "60000000000",
+            reasons: "All",
+          },
+        ],
+        targets: [],
+      },
+    });
+    const { lockedBalance } = await lockedBalanceFn("addr");
+    expect(lockedBalance).toEqual(new BigNumber("60000000000"));
+  });
+
+  it("should estimate lockedBalance when one locked balance is higher than others", async () => {
+    const lockedBalanceFn = getAccount(networkApiMock, jest.fn());
+    networkApiMock.mockResolvedValue({
+      data: {
+        locks: [
+          {
+            amount: "1",
+            reasons: "reason 1",
+          },
+          {
+            amount: "5",
+            reasons: "reason 2",
+          },
+          {
+            amount: "3",
+            reasons: "reason 3",
+          },
+        ],
+        targets: [],
+      },
+    });
+    const { lockedBalance } = await lockedBalanceFn("addr");
+    expect(lockedBalance).toEqual(new BigNumber("5"));
+  });
+});