diff --git a/VERSION b/VERSION
index cde317c..f6859c8 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.3.138
\ No newline at end of file
+1.3.139
\ No newline at end of file
diff --git a/app/services/economic_service.py b/app/services/economic_service.py
index 09ece98..56509e4 100644
--- a/app/services/economic_service.py
+++ b/app/services/economic_service.py
@@ -453,8 +453,9 @@ class EconomicService:
             # Calculate first day of the month 13 months ago (for yearly billed items)
             from dateutil.relativedelta import relativedelta
             now = datetime.now()
-            start_date = (now - relativedelta(months=13)).replace(day=1).strftime('%Y-%m-%d')
-            logger.info(f"📅 Fetching invoices from {start_date} onwards (13 months for yearly billed items)")
+            start_date_obj = (now - relativedelta(months=13)).replace(day=1)
+            start_date = start_date_obj.strftime('%Y-%m-%d')
+            logger.info(f"📅 Will filter invoices from {start_date} onwards (13 months for yearly billed items)")
             
             async with aiohttp.ClientSession() as session:
                 # Try multiple endpoints to find invoices
@@ -482,11 +483,7 @@ class EconomicService:
                         while True:
                             async with session.get(
                                 endpoint,
-                                params={
-                                    "pagesize": 1000, 
-                                    "skippages": page,
-                                    "filter": f"date$gte:{start_date}"
-                                },
+                                params={"pagesize": 1000, "skippages": page},
                                 headers=self._get_headers()
                             ) as response:
                                 logger.info(f"🔍 [API] Response status from {endpoint} (page {page}): {response.status}")
@@ -555,6 +552,29 @@ class EconomicService:
                 
                 logger.info(f"📊 Filtered to {len(customer_invoices)} invoices for customer {customer_number}")
                 
+                # Apply date filter (13 months back)
+                from dateutil.parser import parse as parse_date
+                filtered_by_date = []
+                for inv in customer_invoices:
+                    invoice_date_str = inv.get('date')
+                    if invoice_date_str:
+                        try:
+                            invoice_date = parse_date(invoice_date_str)
+                            if invoice_date.replace(tzinfo=None) >= start_date_obj:
+                                filtered_by_date.append(inv)
+                            else:
+                                logger.debug(f"   Skipped invoice {inv.get('draftInvoiceNumber') or inv.get('bookedInvoiceNumber')} dated {invoice_date_str} (before {start_date})")
+                        except Exception as e:
+                            logger.warning(f"   Could not parse invoice date '{invoice_date_str}': {e}")
+                            # Include if we can't parse the date
+                            filtered_by_date.append(inv)
+                    else:
+                        # Include if no date field
+                        filtered_by_date.append(inv)
+                
+                logger.info(f"📅 After date filter ({start_date}+): {len(filtered_by_date)} invoices")
+                customer_invoices = filtered_by_date
+                
                 # Fetch full invoice data with lines if requested
                 if include_lines and customer_invoices:
                     full_invoices = []