diff --git a/src/modules/auth/auth.controller.ts b/src/modules/auth/auth.controller.ts
index bdc6abc..58a4134 100644
--- a/src/modules/auth/auth.controller.ts
+++ b/src/modules/auth/auth.controller.ts
@@ -3,6 +3,7 @@ import { ApiTags, ApiOperation, ApiResponse, ApiBody } from '@nestjs/swagger';
 import { Throttle } from '@nestjs/throttler';
 import { AuthService } from './auth.service';
 import { LoginDto } from './dto/login.dto';
+import { RefreshDto } from './dto/refresh.dto';
 import {
   AUTH_LOGIN_THROTTLE,
   AUTH_THROTTLE,
@@ -18,7 +19,7 @@ export class AuthController {
   @Throttle(AUTH_LOGIN_THROTTLE)
   @ApiOperation({ summary: 'Login with Stellar wallet signature' })
   @ApiBody({ type: LoginDto })
-  @ApiResponse({ status: 201, description: 'Login successful, returns access token' })
+  @ApiResponse({ status: 201, description: 'Login successful, returns access and refresh tokens' })
   @ApiResponse({ status: 401, description: 'Invalid signature or wallet not found' })
   @ApiResponse({ status: 400, description: 'Invalid request body' })
   @ApiResponse({ status: 429, description: 'Too many login attempts' })
@@ -26,6 +27,16 @@ export class AuthController {
     return this.authService.login(loginDto);
   }
 
+  @Post('refresh')
+  @ApiOperation({ summary: 'Rotate refresh token and issue a new access token' })
+  @ApiBody({ type: RefreshDto })
+  @ApiResponse({ status: 200, description: 'Refresh successful, returns new access and refresh tokens' })
+  @ApiResponse({ status: 401, description: 'Invalid or expired refresh token' })
+  @ApiResponse({ status: 400, description: 'Invalid request body' })
+  async refresh(@Body() refreshDto: RefreshDto) {
+    return this.authService.refresh(refreshDto.refreshToken);
+  }
+
   @Get()
   @ApiOperation({ summary: 'Get auth module status' })
   @ApiResponse({ status: 200, description: 'Module status' })
diff --git a/src/modules/auth/auth.service.spec.ts b/src/modules/auth/auth.service.spec.ts
index d2a638a..115aedb 100644
--- a/src/modules/auth/auth.service.spec.ts
+++ b/src/modules/auth/auth.service.spec.ts
@@ -1,3 +1,26 @@
+import { UnauthorizedException } from '@nestjs/common';
+import { JwtService } from '@nestjs/jwt';
+import { AuthService } from './auth.service';
+import { createMockRepository, MockRepository } from '../../common/mocks/repository.mock';
+import { User } from '../users/user.entity';
+import { Wallet } from '../wallet/wallet.entity';
+
+describe('AuthService', () => {
+  let authService: AuthService;
+  let mockWalletRepo: MockRepository<Wallet>;
+  let mockUserRepo: MockRepository<User>;
+  let jwtService: JwtService;
+
+  beforeEach(() => {
+    mockWalletRepo = createMockRepository<Wallet>();
+    mockUserRepo = createMockRepository<User>();
+    jwtService = { sign: jest.fn().mockReturnValue('mock-access-token') } as unknown as JwtService;
+
+    authService = new AuthService(
+      mockWalletRepo as unknown as any,
+      mockUserRepo as unknown as any,
+      jwtService,
+    );
 import { Test, TestingModule } from '@nestjs/testing';
 import { getRepositoryToken } from '@nestjs/typeorm';
 import { JwtService } from '@nestjs/jwt';
@@ -65,6 +88,103 @@ describe('AuthService - Account Lockout', () => {
     jest.clearAllMocks();
   });
 
+  it('should login and issue access and refresh tokens', async () => {
+    const testUser: User = {
+      id: '123e4567-e89b-12d3-a456-426614174000',
+      email: 'test@example.com',
+      name: 'Test User',
+      role: 'user',
+      isSuspended: false,
+      suspensionReason: null,
+      refreshToken: null,
+      refreshTokenExpiry: null,
+      createdAt: new Date(),
+      updatedAt: new Date(),
+    } as User;
+
+    const testWallet: Wallet = {
+      id: 'wallet-id',
+      publicKey: 'GTESTPUBLICKEY',
+      userId: testUser.id,
+      createdAt: new Date(),
+    } as Wallet;
+
+    mockWalletRepo.findOne.mockResolvedValue(testWallet);
+    mockUserRepo.findOne.mockResolvedValue(testUser);
+    mockUserRepo.update.mockResolvedValue(testUser);
+
+    const result = await authService.login({
+      publicKey: testWallet.publicKey,
+      signature: 'dummy-signature',
+      message: 'dummy-message',
+    });
+
+    expect(result.accessToken).toBe('mock-access-token');
+    expect(result.refreshToken).toBeDefined();
+    expect(result.publicKey).toBe(testWallet.publicKey);
+    expect(result.userId).toBe(testUser.id);
+    expect(mockUserRepo.update).toHaveBeenCalledWith(testUser.id, expect.objectContaining({
+      refreshToken: expect.any(String),
+      refreshTokenExpiry: expect.any(Date),
+    }));
+  });
+
+  it('should refresh and rotate the refresh token', async () => {
+    let currentRefreshToken = 'old-refresh-token';
+    const testUser: User = {
+      id: '123e4567-e89b-12d3-a456-426614174000',
+      email: 'test@example.com',
+      name: 'Test User',
+      role: 'user',
+      isSuspended: false,
+      suspensionReason: null,
+      refreshToken: currentRefreshToken,
+      refreshTokenExpiry: new Date(Date.now() + 10000),
+      createdAt: new Date(),
+      updatedAt: new Date(),
+    } as User;
+
+    const testWallet: Wallet = {
+      id: 'wallet-id',
+      publicKey: 'GTESTPUBLICKEY',
+      userId: testUser.id,
+      createdAt: new Date(),
+    } as Wallet;
+
+    mockUserRepo.findOne.mockImplementation(async (criteria: { where?: { refreshToken?: string } }) => {
+      if (criteria.where?.refreshToken === currentRefreshToken) {
+        return testUser;
+      }
+      return null;
+    });
+
+    mockWalletRepo.findOne.mockResolvedValue(testWallet);
+    mockUserRepo.update.mockImplementation(async (_id: string, update: Partial<User>) => {
+      const refreshToken = update.refreshToken as string;
+      const refreshTokenExpiry = update.refreshTokenExpiry as Date;
+      currentRefreshToken = refreshToken;
+      testUser.refreshToken = refreshToken;
+      testUser.refreshTokenExpiry = refreshTokenExpiry;
+      return testUser;
+    });
+
+    const firstResult = await authService.refresh(currentRefreshToken);
+
+    expect(firstResult.accessToken).toBe('mock-access-token');
+    expect(firstResult.refreshToken).toBeDefined();
+    expect(firstResult.refreshToken).not.toBe('old-refresh-token');
+    expect(mockUserRepo.update).toHaveBeenCalledWith(testUser.id, expect.objectContaining({
+      refreshToken: firstResult.refreshToken,
+      refreshTokenExpiry: expect.any(Date),
+    }));
+
+    await expect(authService.refresh('old-refresh-token')).rejects.toThrow(UnauthorizedException);
+  });
+
+  it('should reject an invalid refresh token', async () => {
+    mockUserRepo.findOne.mockResolvedValue(null);
+
+    await expect(authService.refresh('invalid-token')).rejects.toThrow(UnauthorizedException);
   describe('Account Lockout', () => {
     it('should lock account after 5 failed attempts', async () => {
       mockWalletRepository.findOne.mockResolvedValue(mockWallet);
diff --git a/src/modules/auth/auth.service.ts b/src/modules/auth/auth.service.ts
index 1dd0c3e..5b4c8ea 100644
--- a/src/modules/auth/auth.service.ts
+++ b/src/modules/auth/auth.service.ts
@@ -6,6 +6,14 @@ import { Wallet } from '../wallet/wallet.entity';
 import { User } from '../users/user.entity';
 import { Keypair } from '@stellar/stellar-sdk';
 import { LoginDto } from './dto/login.dto';
+import { randomBytes } from 'crypto';
+
+export interface AuthTokens {
+  accessToken: string;
+  refreshToken: string;
+  publicKey: string;
+  userId: string;
+}
 
 const MAX_FAILED_ATTEMPTS = 5;
 const LOCK_DURATION_MINUTES = 15;
@@ -111,17 +119,70 @@ export class AuthService {
 
     this.logger.log(`Successful login for user: ${user.id}`);
 
-    // Generate JWT token
+    const user = await this.userRepository.findOne({ where: { id: wallet.userId } });
+    if (!user) {
+      throw new UnauthorizedException('User not found');
+    }
+
     const payload = { publicKey: wallet.publicKey, sub: wallet.userId };
-    const accessToken = this.jwtService.sign(payload);
+    const accessToken = this.generateAccessToken(payload);
+    const { token: refreshToken, expiry: refreshTokenExpiry } = this.createRefreshToken();
+
+    await this.userRepository.update(user.id, {
+      refreshToken,
+      refreshTokenExpiry,
+    });
 
     return {
       accessToken,
+      refreshToken,
       publicKey: wallet.publicKey,
       userId: wallet.userId,
     };
   }
 
+  async refresh(refreshToken: string) {
+    if (!refreshToken) {
+      throw new UnauthorizedException('Refresh token is required');
+    }
+
+    const user = await this.userRepository.findOne({ where: { refreshToken } });
+    if (!user || !user.refreshTokenExpiry || user.refreshTokenExpiry.getTime() <= Date.now()) {
+      throw new UnauthorizedException('Invalid or expired refresh token');
+    }
+
+    const wallet = await this.walletRepository.findOne({ where: { userId: user.id } });
+    if (!wallet) {
+      throw new UnauthorizedException('Wallet not found');
+    }
+
+    const payload = { publicKey: wallet.publicKey, sub: user.id };
+    const accessToken = this.generateAccessToken(payload);
+    const { token: newRefreshToken, expiry: refreshTokenExpiry } = this.createRefreshToken();
+
+    await this.userRepository.update(user.id, {
+      refreshToken: newRefreshToken,
+      refreshTokenExpiry,
+    });
+
+    return {
+      accessToken,
+      refreshToken: newRefreshToken,
+      publicKey: wallet.publicKey,
+      userId: user.id,
+    };
+  }
+
+  private generateAccessToken(payload: { publicKey: string; sub: string }): string {
+    return this.jwtService.sign(payload);
+  }
+
+  private createRefreshToken(): { token: string; expiry: Date } {
+    const token = randomBytes(48).toString('hex');
+    const expiry = new Date(Date.now() + 7 * 24 * 60 * 60 * 1000);
+    return { token, expiry };
+  }
+
   private async verifySignature(
     publicKey: string,
     signature: string,
diff --git a/src/modules/auth/dto/refresh.dto.ts b/src/modules/auth/dto/refresh.dto.ts
new file mode 100644
index 0000000..6a09b15
--- /dev/null
+++ b/src/modules/auth/dto/refresh.dto.ts
@@ -0,0 +1,9 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, IsNotEmpty } from 'class-validator';
+
+export class RefreshDto {
+  @ApiProperty({ description: 'Refresh token' })
+  @IsString()
+  @IsNotEmpty()
+  refreshToken: string;
+}
diff --git a/src/modules/users/user.entity.ts b/src/modules/users/user.entity.ts
index 869beea..ac636bc 100644
--- a/src/modules/users/user.entity.ts
+++ b/src/modules/users/user.entity.ts
@@ -25,6 +25,11 @@ export class User {
   @Column({ type: 'varchar', length: 500, nullable: true })
   suspensionReason: string | null;
 
+  @Column({ type: 'varchar', length: 500, nullable: true })
+  refreshToken: string | null;
+
+  @Column({ type: 'datetime', nullable: true })
+  refreshTokenExpiry: Date | null;
   @Column({ type: 'int', default: 0 })
   failedLoginAttempts: number;