diff --git a/backend/src/modules/invoices/bulk-upload.processor.ts b/backend/src/modules/invoices/bulk-upload.processor.ts
index 0d7e021..66781da 100644
--- a/backend/src/modules/invoices/bulk-upload.processor.ts
+++ b/backend/src/modules/invoices/bulk-upload.processor.ts
@@ -1,8 +1,6 @@
-import { Processor, Process } from '@nestjs/bull';
-import { Job } from 'bull';
+import { Processor, Process, InjectQueue } from '@nestjs/bull';
+import { Job, Queue } from 'bull';
 import { Logger } from '@nestjs/common';
-import { InjectRedis } from '@liaoliaots/nestjs-redis';
-import Redis from 'ioredis';
 import { InvoicesService } from './invoice.service';
 
 @Processor('invoice-bulk-queue')
@@ -11,7 +9,7 @@ export class BulkUploadProcessor {
 
   constructor(
     private readonly invoicesService: InvoicesService,
-    @InjectRedis() private readonly redis: Redis,
+    @InjectQueue('invoice-bulk-queue') private readonly bulkQueue: Queue,
   ) {}
 
   @Process('process-zip')
@@ -24,11 +22,11 @@ export class BulkUploadProcessor {
     // 1. Calculate Hash (MD5/SHA256)
     // 2. Check Redis SMEMBERS to prevent duplicate processing
     // const hash = 'calculated_file_hash';
-    // const exists = await this.redis.sismember(`company:${companyId}:invoice-hashes`, hash);
+    // const exists = await this.bulkQueue.client.sismember(`company:${companyId}:invoice-hashes`, hash);
     // if (exists) return;
     
     // 3. Save hash and trigger individual processing
-    // await this.redis.sadd(`company:${companyId}:invoice-hashes`, hash);
+    // await this.bulkQueue.client.sadd(`company:${companyId}:invoice-hashes`, hash);
     // await this.invoicesService.processSingleFile(fileInZip, tenantId, companyId);
   }
 }
diff --git a/backend/src/modules/invoices/gemini-extractor.service.ts b/backend/src/modules/invoices/gemini-extractor.service.ts
index ee4fa80..68aabec 100644
--- a/backend/src/modules/invoices/gemini-extractor.service.ts
+++ b/backend/src/modules/invoices/gemini-extractor.service.ts
@@ -122,7 +122,7 @@ export class GeminiExtractorService {
       const data = JSON.parse(cleanedJson);
       return data.invoices || [];
     } catch (error: any) {
-      this.logger.error(\`AI Extraction failed: \${error.message}\`);
+      this.logger.error(`AI Extraction failed: ${error.message}`);
       throw new InternalServerErrorException('AI Extraction failed');
     }
   }
diff --git a/backend/src/modules/invoices/invoice.processor.ts b/backend/src/modules/invoices/invoice.processor.ts
index 8baf896..c7eb7d9 100644
--- a/backend/src/modules/invoices/invoice.processor.ts
+++ b/backend/src/modules/invoices/invoice.processor.ts
@@ -179,7 +179,7 @@ export class InvoiceProcessor {
     if (result.isValid) {
       await this.invoiceRepository.update(invoiceId, { 
         status: InvoiceStatus.VALIDATED,
-        validation_errors: null,
+        validation_errors: [],
       });
     } else {
       await this.invoiceRepository.update(invoiceId, { 
diff --git a/backend/src/modules/invoices/ubl-generator.service.ts b/backend/src/modules/invoices/ubl-generator.service.ts
index 5cbf1b9..21c4884 100644
--- a/backend/src/modules/invoices/ubl-generator.service.ts
+++ b/backend/src/modules/invoices/ubl-generator.service.ts
@@ -83,7 +83,7 @@ export class UBLGeneratorService {
       .up();
 
     // ── InvoiceLines ─────────────────────────────────────
-    invoice.lines.forEach((line) => {
+    invoice.lines.forEach((line: any) => {
       doc.ele('cac:InvoiceLine')
         .ele('cbc:ID').txt(line.line_number.toString()).up()
         .ele('cbc:InvoicedQuantity', { unitCode: 'PCE' }).txt(line.quantity.toString()).up()