diff --git a/web3.js/src/vote-program.ts b/web3.js/src/vote-program.ts
index 2557504cde..272a6b0da1 100644
--- a/web3.js/src/vote-program.ts
+++ b/web3.js/src/vote-program.ts
@@ -49,6 +49,17 @@ export type InitializeAccountParams = {
   voteInit: VoteInit;
 };
 
+/**
+ * Authorize instruction params
+ */
+export type AuthorizeVoteParams = {
+  votePubkey: PublicKey;
+  /** Current vote or withdraw authority, depending on `voteAuthorizationType` */
+  authorizedPubkey: PublicKey;
+  newAuthorizedPubkey: PublicKey;
+  voteAuthorizationType: VoteAuthorizationType;
+};
+
 /**
  * Withdraw from vote account transaction params
  */
@@ -120,6 +131,30 @@ export class VoteInstruction {
     };
   }
 
+  /**
+   * Decode an authorize instruction and retrieve the instruction params.
+   */
+  static decodeAuthorize(
+    instruction: TransactionInstruction,
+  ): AuthorizeVoteParams {
+    this.checkProgramId(instruction.programId);
+    this.checkKeyLength(instruction.keys, 3);
+
+    const {newAuthorized, voteAuthorizationType} = decodeData(
+      VOTE_INSTRUCTION_LAYOUTS.Authorize,
+      instruction.data,
+    );
+
+    return {
+      votePubkey: instruction.keys[0].pubkey,
+      authorizedPubkey: instruction.keys[2].pubkey,
+      newAuthorizedPubkey: new PublicKey(newAuthorized),
+      voteAuthorizationType: {
+        index: voteAuthorizationType,
+      },
+    };
+  }
+
   /**
    * Decode a withdraw instruction and retrieve the instruction params.
    */
@@ -166,7 +201,10 @@ export class VoteInstruction {
 /**
  * An enumeration of valid VoteInstructionType's
  */
-export type VoteInstructionType = 'InitializeAccount' | 'Withdraw';
+export type VoteInstructionType =
+  | 'Authorize'
+  | 'InitializeAccount'
+  | 'Withdraw';
 
 const VOTE_INSTRUCTION_LAYOUTS: {
   [type in VoteInstructionType]: InstructionType;
@@ -178,6 +216,14 @@ const VOTE_INSTRUCTION_LAYOUTS: {
       Layout.voteInit(),
     ]),
   },
+  Authorize: {
+    index: 1,
+    layout: BufferLayout.struct([
+      BufferLayout.u32('instruction'),
+      Layout.publicKey('newAuthorized'),
+      BufferLayout.u32('voteAuthorizationType'),
+    ]),
+  },
   Withdraw: {
     index: 3,
     layout: BufferLayout.struct([
@@ -187,6 +233,26 @@ const VOTE_INSTRUCTION_LAYOUTS: {
   },
 });
 
+/**
+ * VoteAuthorize type
+ */
+export type VoteAuthorizationType = {
+  /** The VoteAuthorize index (from solana-vote-program) */
+  index: number;
+};
+
+/**
+ * An enumeration of valid VoteAuthorization layouts.
+ */
+export const VoteAuthorizationLayout = Object.freeze({
+  Voter: {
+    index: 0,
+  },
+  Withdrawer: {
+    index: 1,
+  },
+});
+
 /**
  * Factory class for transactions to interact with the Vote program
  */
@@ -267,6 +333,36 @@ export class VoteProgram {
     );
   }
 
+  /**
+   * Generate a transaction that authorizes a new Voter or Withdrawer on the Vote account.
+   */
+  static authorize(params: AuthorizeVoteParams): Transaction {
+    const {
+      votePubkey,
+      authorizedPubkey,
+      newAuthorizedPubkey,
+      voteAuthorizationType,
+    } = params;
+
+    const type = VOTE_INSTRUCTION_LAYOUTS.Authorize;
+    const data = encodeData(type, {
+      newAuthorized: toBuffer(newAuthorizedPubkey.toBuffer()),
+      voteAuthorizationType: voteAuthorizationType.index,
+    });
+
+    const keys = [
+      {pubkey: votePubkey, isSigner: false, isWritable: true},
+      {pubkey: SYSVAR_CLOCK_PUBKEY, isSigner: false, isWritable: false},
+      {pubkey: authorizedPubkey, isSigner: true, isWritable: false},
+    ];
+
+    return new Transaction().add({
+      keys,
+      programId: this.programId,
+      data,
+    });
+  }
+
   /**
    * Generate a transaction to withdraw from a Vote account.
    */
diff --git a/web3.js/test/vote-program.test.ts b/web3.js/test/vote-program.test.ts
index e8bb371c45..aab52b07f0 100644
--- a/web3.js/test/vote-program.test.ts
+++ b/web3.js/test/vote-program.test.ts
@@ -4,6 +4,7 @@ import chaiAsPromised from 'chai-as-promised';
 import {
   Keypair,
   LAMPORTS_PER_SOL,
+  VoteAuthorizationLayout,
   VoteInit,
   VoteInstruction,
   VoteProgram,
@@ -76,6 +77,25 @@ describe('VoteProgram', () => {
     );
   });
 
+  it('authorize', () => {
+    const votePubkey = Keypair.generate().publicKey;
+    const authorizedPubkey = Keypair.generate().publicKey;
+    const newAuthorizedPubkey = Keypair.generate().publicKey;
+    const voteAuthorizationType = VoteAuthorizationLayout.Voter;
+    const params = {
+      votePubkey,
+      authorizedPubkey,
+      newAuthorizedPubkey,
+      voteAuthorizationType,
+    };
+    const transaction = VoteProgram.authorize(params);
+    expect(transaction.instructions).to.have.length(1);
+    const [authorizeInstruction] = transaction.instructions;
+    expect(params).to.eql(
+      VoteInstruction.decodeAuthorize(authorizeInstruction),
+    );
+  });
+
   it('withdraw', () => {
     const votePubkey = Keypair.generate().publicKey;
     const authorizedWithdrawerPubkey = Keypair.generate().publicKey;
@@ -133,9 +153,8 @@ describe('VoteProgram', () => {
           authorized.publicKey,
           5,
         ),
-        lamports: minimumAmount + 2 * LAMPORTS_PER_SOL,
+        lamports: minimumAmount + 10 * LAMPORTS_PER_SOL,
       });
-
       await sendAndConfirmTransaction(
         connection,
         createAndInitialize,
@@ -143,24 +162,104 @@ describe('VoteProgram', () => {
         {preflightCommitment: 'confirmed'},
       );
       expect(await connection.getBalance(newVoteAccount.publicKey)).to.eq(
-        minimumAmount + 2 * LAMPORTS_PER_SOL,
+        minimumAmount + 10 * LAMPORTS_PER_SOL,
       );
 
       // Withdraw from Vote account
-      const recipient = Keypair.generate();
+      let recipient = Keypair.generate();
       let withdraw = VoteProgram.withdraw({
         votePubkey: newVoteAccount.publicKey,
         authorizedWithdrawerPubkey: authorized.publicKey,
         lamports: LAMPORTS_PER_SOL,
         toPubkey: recipient.publicKey,
       });
-
       await sendAndConfirmTransaction(connection, withdraw, [authorized], {
         preflightCommitment: 'confirmed',
       });
       expect(await connection.getBalance(recipient.publicKey)).to.eq(
         LAMPORTS_PER_SOL,
       );
+
+      const newAuthorizedWithdrawer = Keypair.generate();
+      await helpers.airdrop({
+        connection,
+        address: newAuthorizedWithdrawer.publicKey,
+        amount: LAMPORTS_PER_SOL,
+      });
+      expect(
+        await connection.getBalance(newAuthorizedWithdrawer.publicKey),
+      ).to.eq(LAMPORTS_PER_SOL);
+
+      // Authorize a new Withdrawer.
+      let authorize = VoteProgram.authorize({
+        votePubkey: newVoteAccount.publicKey,
+        authorizedPubkey: authorized.publicKey,
+        newAuthorizedPubkey: newAuthorizedWithdrawer.publicKey,
+        voteAuthorizationType: VoteAuthorizationLayout.Withdrawer,
+      });
+      await sendAndConfirmTransaction(connection, authorize, [authorized], {
+        preflightCommitment: 'confirmed',
+      });
+
+      // Test old authorized cannot withdraw anymore.
+      withdraw = VoteProgram.withdraw({
+        votePubkey: newVoteAccount.publicKey,
+        authorizedWithdrawerPubkey: authorized.publicKey,
+        lamports: minimumAmount,
+        toPubkey: recipient.publicKey,
+      });
+      await expect(
+        sendAndConfirmTransaction(connection, withdraw, [authorized], {
+          preflightCommitment: 'confirmed',
+        }),
+      ).to.be.rejected;
+
+      // Test newAuthorizedWithdrawer may withdraw.
+      recipient = Keypair.generate();
+      withdraw = VoteProgram.withdraw({
+        votePubkey: newVoteAccount.publicKey,
+        authorizedWithdrawerPubkey: newAuthorizedWithdrawer.publicKey,
+        lamports: LAMPORTS_PER_SOL,
+        toPubkey: recipient.publicKey,
+      });
+      await sendAndConfirmTransaction(
+        connection,
+        withdraw,
+        [newAuthorizedWithdrawer],
+        {
+          preflightCommitment: 'confirmed',
+        },
+      );
+      expect(await connection.getBalance(recipient.publicKey)).to.eq(
+        LAMPORTS_PER_SOL,
+      );
+
+      const newAuthorizedVoter = Keypair.generate();
+      await helpers.airdrop({
+        connection,
+        address: newAuthorizedVoter.publicKey,
+        amount: LAMPORTS_PER_SOL,
+      });
+      expect(await connection.getBalance(newAuthorizedVoter.publicKey)).to.eq(
+        LAMPORTS_PER_SOL,
+      );
+
+      // The authorized Withdrawer may sign to authorize a new Voter, see
+      // https://github.com/solana-labs/solana/issues/22521
+      authorize = VoteProgram.authorize({
+        votePubkey: newVoteAccount.publicKey,
+        authorizedPubkey: newAuthorizedWithdrawer.publicKey,
+        newAuthorizedPubkey: newAuthorizedVoter.publicKey,
+        voteAuthorizationType: VoteAuthorizationLayout.Voter,
+      });
+      await sendAndConfirmTransaction(
+        connection,
+        authorize,
+        [newAuthorizedWithdrawer],
+        {
+          preflightCommitment: 'confirmed',
+        },
+      );
     }).timeout(10 * 1000);
   }
 });