diff --git a/packages/jellyfish-api-core/__tests__/category/oracle/updateOracle.test.ts b/packages/jellyfish-api-core/__tests__/category/oracle/updateOracle.test.ts
new file mode 100644
index 0000000000..c93cec2d2c
--- /dev/null
+++ b/packages/jellyfish-api-core/__tests__/category/oracle/updateOracle.test.ts
@@ -0,0 +1,232 @@
+import { MasterNodeRegTestContainer } from '@defichain/testcontainers'
+import { ContainerAdapterClient } from '../../container_adapter_client'
+import { RpcApiError } from '../../../src'
+import { UTXO } from '../../../src/category/oracle'
+
+describe('Oracle', () => {
+  const container = new MasterNodeRegTestContainer()
+  const client = new ContainerAdapterClient(container)
+
+  beforeAll(async () => {
+    await container.start()
+    await container.waitForReady()
+    await container.waitForWalletCoinbaseMaturity()
+  })
+
+  afterAll(async () => {
+    await container.stop()
+  })
+
+  it('should updateOracle', async () => {
+    // Appoint oracle
+    const appointOraclePriceFeeds = [
+      { token: 'APPLE', currency: 'EUR' },
+      { token: 'TESLA', currency: 'USD' }
+    ]
+
+    const oracleid = await container.call('appointoracle', [await container.getNewAddress(), appointOraclePriceFeeds, 1])
+
+    await container.generate(1)
+
+    // Update oracle
+    const updateOraclePriceFeeds = [
+      { token: 'FB', currency: 'CNY' },
+      { token: 'MSFT', currency: 'SGD' }
+    ]
+
+    await client.oracle.updateOracle(oracleid, await container.getNewAddress(), {
+      priceFeeds: updateOraclePriceFeeds,
+      weightage: 2
+    })
+
+    await container.generate(1)
+
+    const data = await container.call('getoracledata', [oracleid])
+
+    expect(data).toStrictEqual({
+      weightage: 2,
+      oracleid,
+      address: expect.any(String),
+      priceFeeds: updateOraclePriceFeeds,
+      tokenPrices: []
+    })
+  })
+
+  it('should not updateOracle for invalid oracleid', async () => {
+    const oracleid = '8430ac5711d78dc6f98591e144916d27f80952271c62cc15410f878d9b08300d'
+
+    const priceFeeds = [
+      { token: 'APPLE', currency: 'EUR' },
+      { token: 'TESLA', currency: 'USD' }
+    ]
+
+    const promise = client.oracle.updateOracle(oracleid, await container.getNewAddress(), { priceFeeds, weightage: 1 })
+
+    await expect(promise).rejects.toThrow(RpcApiError)
+    await expect(promise).rejects.toThrow(`RpcApiError: 'Test UpdateOracleAppointTx execution failed:\noracle <${oracleid as string}> not found', code: -32600, method: updateoracle`)
+  })
+
+  it('should updateOracle using same tokens and currencies', async () => {
+    // Appoint oracle
+    const appointOraclePriceFeeds = [
+      { token: 'APPLE', currency: 'EUR' },
+      { token: 'TESLA', currency: 'USD' }
+    ]
+
+    const oracleid = await container.call('appointoracle', [await container.getNewAddress(), appointOraclePriceFeeds, 1])
+
+    await container.generate(1)
+
+    // Update oracle
+    const updateOraclePriceFeeds = [
+      { token: 'CNY', currency: 'FB' },
+      { token: 'CNY', currency: 'FB' }
+    ]
+
+    await client.oracle.updateOracle(oracleid, await container.getNewAddress(), {
+      priceFeeds: updateOraclePriceFeeds,
+      weightage: 2
+    })
+
+    await container.generate(1)
+
+    const data = await container.call('getoracledata', [oracleid])
+
+    expect(data.priceFeeds).toStrictEqual([{ token: 'CNY', currency: 'FB' }])
+  })
+
+  it('should updateOracle using random tokens and currencies with 1 letter', async () => {
+    // Appoint oracle
+    const appointOraclePriceFeeds = [
+      { token: 'APPLE', currency: 'EUR' },
+      { token: 'TESLA', currency: 'USD' }
+    ]
+
+    const oracleid = await container.call('appointoracle', [await container.getNewAddress(), appointOraclePriceFeeds, 1])
+
+    await container.generate(1)
+
+    // Update oracle
+    const updateOraclePriceFeeds = [
+      { token: 'A', currency: 'C' },
+      { token: 'B', currency: 'D' }
+    ]
+
+    await client.oracle.updateOracle(oracleid, await container.getNewAddress(), {
+      priceFeeds: updateOraclePriceFeeds,
+      weightage: 2
+    })
+
+    await container.generate(1)
+
+    const data = await container.call('getoracledata', [oracleid])
+
+    expect(data.priceFeeds).toStrictEqual(updateOraclePriceFeeds)
+  })
+
+  it('should updateOracle using random tokens and currencies with 15 letters', async () => {
+    // Appoint oracle
+    const appointOraclePriceFeeds = [
+      { token: 'APPLE', currency: 'EUR' },
+      { token: 'TESLA', currency: 'USD' }
+    ]
+
+    const oracleid = await container.call('appointoracle', [await container.getNewAddress(), appointOraclePriceFeeds, 1])
+
+    await container.generate(1)
+
+    // Update oracle
+    const updateOraclePriceFeeds = [
+      { token: '123456789012345', currency: '123456789012345' },
+      { token: 'ABCDEFGHIJKLMNO', currency: 'ABCDEFGHIJKLMNO' }
+    ]
+
+    await client.oracle.updateOracle(oracleid, await container.getNewAddress(), {
+      priceFeeds: updateOraclePriceFeeds,
+      weightage: 2
+    })
+
+    await container.generate(1)
+
+    const data = await container.call('getoracledata', [oracleid])
+
+    expect(data.priceFeeds).toStrictEqual([
+      { token: '12345678', currency: '12345678' },
+      { token: 'ABCDEFGH', currency: 'ABCDEFGH' }
+    ])
+  })
+
+  it('should updateOracle with utxos', async () => {
+    // Appoint oracle
+    const address = await container.getNewAddress()
+
+    const appointOraclePriceFeeds = [
+      { token: 'APPLE', currency: 'EUR' },
+      { token: 'TESLA', currency: 'USD' }
+    ]
+
+    const oracleid = await container.call('appointoracle', [address, appointOraclePriceFeeds, 1])
+
+    await container.generate(1)
+
+    // Update oracle
+    const updateOraclePriceFeeds = [
+      { token: 'FB', currency: 'CNY' },
+      { token: 'MSFT', currency: 'SGD' }
+    ]
+
+    const utxos = await container.call('listunspent', [1, 9999999, [address], true])
+    const inputs: UTXO[] = utxos.map((utxo: UTXO) => {
+      return {
+        txid: utxo.txid,
+        vout: utxo.vout
+      }
+    })
+
+    await client.oracle.updateOracle(oracleid, await container.getNewAddress(), {
+      priceFeeds: updateOraclePriceFeeds,
+      weightage: 2,
+      utxos: inputs
+    })
+
+    await container.generate(1)
+
+    const data = await container.call('getoracledata', [oracleid])
+
+    expect(data).toStrictEqual({
+      weightage: 2,
+      oracleid,
+      address: expect.any(String),
+      priceFeeds: updateOraclePriceFeeds,
+      tokenPrices: []
+    })
+  })
+
+  it('should not updateOracle with arbitrary utxos', async () => {
+    // Appoint oracle
+    const appointOraclePriceFeeds = [
+      { token: 'APPLE', currency: 'EUR' },
+      { token: 'TESLA', currency: 'USD' }
+    ]
+
+    const oracleid = await container.call('appointoracle', [await container.getNewAddress(), appointOraclePriceFeeds, 1])
+
+    await container.generate(1)
+
+    // Update oracle
+    const updateOraclePriceFeeds = [
+      { token: 'FB', currency: 'CNY' },
+      { token: 'MSFT', currency: 'SGD' }
+    ]
+
+    const { txid, vout } = await container.fundAddress(await container.getNewAddress(), 10)
+    const promise = client.oracle.updateOracle(oracleid, await container.getNewAddress(), {
+      priceFeeds: updateOraclePriceFeeds,
+      weightage: 2,
+      utxos: [{ txid, vout }]
+    })
+
+    await expect(promise).rejects.toThrow(RpcApiError)
+    await expect(promise).rejects.toThrow('RpcApiError: \'Test UpdateOracleAppointTx execution failed:\ntx not from foundation member\', code: -32600, method: updateoracle')
+  })
+})
diff --git a/packages/jellyfish-api-core/src/category/oracle.ts b/packages/jellyfish-api-core/src/category/oracle.ts
index 72b30e35be..10bda71a17 100644
--- a/packages/jellyfish-api-core/src/category/oracle.ts
+++ b/packages/jellyfish-api-core/src/category/oracle.ts
@@ -20,7 +20,7 @@ export class Oracle {
    * @param {UTXO[]} [options.utxos = []]
    * @param {string} [options.utxos.txid]
    * @param {number} [options.utxos.vout]
-   * @return {Promise<string>} oracleid
+   * @return {Promise<string>} oracleid, also the txn id for txn created to appoint oracle
    */
   async appointOracle (address: string, priceFeeds: PriceFeed[], options: AppointOracleOptions = {}): Promise<string> {
     const { utxos = [] } = options
@@ -34,16 +34,29 @@ export class Oracle {
    * @param {UTXO[]} [utxos = []]
    * @param {string} [utxos.txid]
    * @param {number} [utxos.vout]
-   * @return {Promise<string>} oracleid
+   * @return {Promise<string>} txid
    */
   async removeOracle (oracleid: string, utxos: UTXO[] = []): Promise<string> {
     return await this.client.call('removeoracle', [oracleid, utxos], 'number')
   }
-}
 
-export interface PriceFeed {
-  currency: string
-  token: string
+  /**
+   * Update a price oracle for rely of real time price data.
+   *
+   * @param {string} oracleid
+   * @param {string} address
+   * @param {UpdateOracleOptions} [options]
+   * @param {PriceFeed[]} options.priceFeeds
+   * @param {number} options.weightage
+   * @param {UTXO[]} [options.utxos = []]
+   * @param {string} [options.utxos.txid]
+   * @param {number} [options.utxos.vout]
+   * @return {Promise<string>} txid
+   */
+  async updateOracle (oracleid: string, address: string, options: UpdateOracleOptions = {}): Promise<string> {
+    const { utxos = [] } = options
+    return await this.client.call('updateoracle', [oracleid, address, options.priceFeeds, options.weightage, utxos], 'number')
+  }
 }
 
 export interface AppointOracleOptions {
@@ -51,6 +64,17 @@ export interface AppointOracleOptions {
   utxos?: UTXO[]
 }
 
+export interface UpdateOracleOptions {
+  priceFeeds?: PriceFeed[]
+  weightage?: number
+  utxos?: UTXO[]
+}
+
+export interface PriceFeed {
+  currency: string
+  token: string
+}
+
 export interface UTXO {
   txid: string
   vout: number
diff --git a/website/docs/jellyfish/api/oracle.md b/website/docs/jellyfish/api/oracle.md
index 08020842c6..3a04a3b8e3 100644
--- a/website/docs/jellyfish/api/oracle.md
+++ b/website/docs/jellyfish/api/oracle.md
@@ -52,3 +52,29 @@ interface UTXO {
   vout: number
 }
 ```
+
+## updateOracle
+
+Update a price oracle for rely of real time price data.
+
+```ts title="client.oracle.updateOracle()"
+interface oracle {
+  updateOracle (oracleid: string, address: string, options: UpdateOracleOptions = {}): Promise<string>
+}
+
+interface UpdateOracleOptions {
+  priceFeeds?: PriceFeed[]
+  weightage?: number
+  utxos?: UTXO[]
+}
+
+interface PriceFeed {
+  currency: string
+  token: string
+}
+
+interface UTXO {
+  txid: string
+  vout: number
+}
+```