diff --git a/frontend/src/utils/exportValidator.ts b/frontend/src/utils/exportValidator.ts
index b1f7faa2..ea94aee5 100644
--- a/frontend/src/utils/exportValidator.ts
+++ b/frontend/src/utils/exportValidator.ts
@@ -1,7 +1,7 @@
 import type { ExportTransaction, ExportPosition, ExportPortfolio, ExportReward } from '../types/export';
 
 export class ExportValidator {
-  static validateTransactions(transactions: any[]): transactions is ExportTransaction[] {
+  static validateTransactions(transactions: unknown[]): transactions is ExportTransaction[] {
     if (!Array.isArray(transactions)) return false;
 
     return transactions.every(t =>
@@ -15,7 +15,7 @@ export class ExportValidator {
     );
   }
 
-  static validatePositions(positions: any[]): positions is ExportPosition[] {
+  static validatePositions(positions: unknown[]): positions is ExportPosition[] {
     if (!Array.isArray(positions)) return false;
 
     return positions.every(p =>
@@ -30,7 +30,7 @@ export class ExportValidator {
     );
   }
 
-  static validatePortfolio(portfolio: any): portfolio is ExportPortfolio {
+  static validatePortfolio(portfolio: unknown): portfolio is ExportPortfolio {
     return (
       typeof portfolio.totalValue === 'number' &&
       typeof portfolio.totalInvested === 'number' &&
@@ -42,7 +42,7 @@ export class ExportValidator {
     );
   }
 
-  static validateRewards(rewards: any[]): rewards is ExportReward[] {
+  static validateRewards(rewards: unknown[]): rewards is ExportReward[] {
     if (!Array.isArray(rewards)) return false;
 
     return rewards.every(r =>
@@ -78,7 +78,7 @@ export class ExportValidator {
     return year >= 1900 && year <= currentYear;
   }
 
-  static getValidationErrors(data: any, type: string): string[] {
+  static getValidationErrors(data: unknown, type: string): string[] {
     const errors: string[] = [];
 
     switch (type) {
diff --git a/frontend/src/utils/websocketUtils.ts b/frontend/src/utils/websocketUtils.ts
index 3f5d3617..f6bb0952 100644
--- a/frontend/src/utils/websocketUtils.ts
+++ b/frontend/src/utils/websocketUtils.ts
@@ -262,14 +262,14 @@ export function mergeOrderBooks(oldBook: OrderBookUpdate, newBook: OrderBookUpda
   };
 }
 
-function mergeOrderLevels(old: Array<{ price: number; amount: number }>, _new: Array<{ price: number; amount: number }>): Array<{ price: number; amount: number }> {
+function mergeOrderLevels(old: Array<{ price: number; amount: number }>, updates: Array<{ price: number; amount: number }>): Array<{ price: number; amount: number }> {
   const map = new Map<number, number>();
 
   old.forEach(({ price, amount }) => {
     map.set(price, amount);
   });
 
-  _new.forEach(({ price, amount }) => {
+  updates.forEach(({ price, amount }) => {
     if (amount === 0) {
       map.delete(price);
     } else {