diff --git a/CHANGELOG.md b/CHANGELOG.md
index 080a65cf..841ad6ac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Improved the symbol validation in the _Yahoo Finance_ service (get asset profiles)
 - Refreshed the cryptocurrencies list
 
+### Fixed
+
+- Fixed an issue in the activities import functionality related to the account balances
+
 ## 2.146.0 - 2025-03-15
 
 ### Changed
diff --git a/apps/api/src/app/import/create-account-with-balances.dto.ts b/apps/api/src/app/import/create-account-with-balances.dto.ts
new file mode 100644
index 00000000..fd4b8df4
--- /dev/null
+++ b/apps/api/src/app/import/create-account-with-balances.dto.ts
@@ -0,0 +1,10 @@
+import { CreateAccountDto } from '@ghostfolio/api/app/account/create-account.dto';
+import { AccountBalance } from '@ghostfolio/common/interfaces';
+
+import { IsArray, IsOptional } from 'class-validator';
+
+export class CreateAccountWithBalancesDto extends CreateAccountDto {
+  @IsArray()
+  @IsOptional()
+  balances?: AccountBalance;
+}
diff --git a/apps/api/src/app/import/import-data.dto.ts b/apps/api/src/app/import/import-data.dto.ts
index 71576682..207c8152 100644
--- a/apps/api/src/app/import/import-data.dto.ts
+++ b/apps/api/src/app/import/import-data.dto.ts
@@ -1,15 +1,16 @@
-import { CreateAccountDto } from '@ghostfolio/api/app/account/create-account.dto';
 import { CreateOrderDto } from '@ghostfolio/api/app/order/create-order.dto';
 
 import { Type } from 'class-transformer';
 import { IsArray, IsOptional, ValidateNested } from 'class-validator';
 
+import { CreateAccountWithBalancesDto } from './create-account-with-balances.dto';
+
 export class ImportDataDto {
   @IsOptional()
   @IsArray()
-  @Type(() => CreateAccountDto)
+  @Type(() => CreateAccountWithBalancesDto)
   @ValidateNested({ each: true })
-  accounts: CreateAccountDto[];
+  accounts: CreateAccountWithBalancesDto[];
 
   @IsArray()
   @Type(() => CreateOrderDto)
diff --git a/libs/common/src/lib/interfaces/account-balance.interface.ts b/libs/common/src/lib/interfaces/account-balance.interface.ts
new file mode 100644
index 00000000..00fcf1e5
--- /dev/null
+++ b/libs/common/src/lib/interfaces/account-balance.interface.ts
@@ -0,0 +1,4 @@
+export interface AccountBalance {
+  date: string;
+  value: number;
+}
diff --git a/libs/common/src/lib/interfaces/export.interface.ts b/libs/common/src/lib/interfaces/export.interface.ts
index 0772159e..24e47877 100644
--- a/libs/common/src/lib/interfaces/export.interface.ts
+++ b/libs/common/src/lib/interfaces/export.interface.ts
@@ -1,8 +1,10 @@
 import { Account, Order, Platform, Tag } from '@prisma/client';
 
+import { AccountBalance } from './account-balance.interface';
+
 export interface Export {
   accounts: (Omit<Account, 'createdAt' | 'updatedAt' | 'userId'> & {
-    balances: { date: string; value: number }[];
+    balances: AccountBalance[];
   })[];
   activities: (Omit<
     Order,
diff --git a/libs/common/src/lib/interfaces/index.ts b/libs/common/src/lib/interfaces/index.ts
index 3dcbbb32..5f8b8b5b 100644
--- a/libs/common/src/lib/interfaces/index.ts
+++ b/libs/common/src/lib/interfaces/index.ts
@@ -1,4 +1,5 @@
 import type { Access } from './access.interface';
+import type { AccountBalance } from './account-balance.interface';
 import type { Accounts } from './accounts.interface';
 import type { AdminData } from './admin-data.interface';
 import type { AdminJobs } from './admin-jobs.interface';
@@ -68,6 +69,7 @@ import type { XRayRulesSettings } from './x-ray-rules-settings.interface';
 
 export {
   Access,
+  AccountBalance,
   AccountBalancesResponse,
   Accounts,
   AdminData,