diff --git a/lib/constants.dart b/lib/constants.dart
index acf998aa4..3c1e0bc1c 100644
--- a/lib/constants.dart
+++ b/lib/constants.dart
@@ -16,6 +16,7 @@ const int kMinPatchAppVersion = 3;
 const int kMaxRecordsPerApiPage = 5000;
 const int kMillisecondsToRefreshData = 1000 * 60 * 15; // 15 minutes
 const int kMillisecondsToRefreshActivities = 1000 * 60 * 60 * 24; // 1 day
+const int kUpdatedAtBufferSeconds = 600;
 //const int kMillisecondsToRefreshActivities = 1000 * 15; // 15 seconds
 
 const int kCurrencyUSDollar = 1;
diff --git a/lib/data/repositories/client_repository.dart b/lib/data/repositories/client_repository.dart
index 12942e90b..2f9b59d23 100644
--- a/lib/data/repositories/client_repository.dart
+++ b/lib/data/repositories/client_repository.dart
@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
 import 'dart:core';
+import 'package:invoiceninja_flutter/constants.dart';
 import 'package:invoiceninja_flutter/data/models/serializers.dart';
 import 'package:built_collection/built_collection.dart';
 
@@ -37,7 +38,7 @@ class ClientRepository {
     String url = auth.url + '/clients';
 
     if (updatedAt > 0) {
-      url += '?updated_at=${updatedAt - 600}';
+      url += '?updated_at=${updatedAt - kUpdatedAtBufferSeconds}';
     }
 
     final dynamic response = await webClient.get(url, company.token);
diff --git a/lib/data/repositories/invoice_repository.dart b/lib/data/repositories/invoice_repository.dart
index c5de28a3a..328d09b60 100644
--- a/lib/data/repositories/invoice_repository.dart
+++ b/lib/data/repositories/invoice_repository.dart
@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
 import 'dart:core';
+import 'package:invoiceninja_flutter/constants.dart';
 import 'package:invoiceninja_flutter/data/models/serializers.dart';
 import 'package:built_collection/built_collection.dart';
 
@@ -31,7 +32,7 @@ class InvoiceRepository {
     String url = auth.url + '/invoices?include=invitations&invoice_type_id=1&is_recurring=0'; // invoice_type_id=1
 
     if (updatedAt > 0) {
-      url += '&updated_at=${updatedAt - 600}';
+      url += '&updated_at=${updatedAt - kUpdatedAtBufferSeconds}';
     }
 
     final dynamic response = await webClient.get(url, company.token);
diff --git a/lib/data/repositories/product_repository.dart b/lib/data/repositories/product_repository.dart
index 16cb08b4f..c35f80a01 100644
--- a/lib/data/repositories/product_repository.dart
+++ b/lib/data/repositories/product_repository.dart
@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
 import 'dart:core';
+import 'package:invoiceninja_flutter/constants.dart';
 import 'package:invoiceninja_flutter/data/models/serializers.dart';
 import 'package:built_collection/built_collection.dart';
 
@@ -20,7 +21,7 @@ class ProductRepository {
     String url = auth.url + '/products';
 
     if (updatedAt > 0) {
-      url += '?updated_at=${updatedAt - 600}';
+      url += '?updated_at=${updatedAt - kUpdatedAtBufferSeconds}';
     }
 
     final dynamic response = await webClient.get(url, company.token);
diff --git a/lib/data/repositories/quote_repository.dart b/lib/data/repositories/quote_repository.dart
index 2add79c73..613d7a68c 100644
--- a/lib/data/repositories/quote_repository.dart
+++ b/lib/data/repositories/quote_repository.dart
@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:convert';
 import 'dart:core';
 import 'package:built_collection/built_collection.dart';
+import 'package:invoiceninja_flutter/constants.dart';
 import 'package:invoiceninja_flutter/data/models/serializers.dart';
 import 'package:invoiceninja_flutter/redux/auth/auth_state.dart';
 import 'package:invoiceninja_flutter/data/models/models.dart';
@@ -30,7 +31,7 @@ class QuoteRepository {
     String url = auth.url + '/invoices?include=invitations&invoice_type_id=2&is_recurring=0';
 
     if (updatedAt > 0) {
-      url += '&updated_at=${updatedAt - 600}';
+      url += '&updated_at=${updatedAt - kUpdatedAtBufferSeconds}';
     }
 
     final dynamic response = await webClient.get(url, company.token);
diff --git a/stubs/data/repositories/stub_repository b/stubs/data/repositories/stub_repository
index 40ee6a2e1..42eecfe51 100644
--- a/stubs/data/repositories/stub_repository
+++ b/stubs/data/repositories/stub_repository
@@ -30,7 +30,7 @@ class StubRepository {
     String url = auth.url + '/stubs';
 
     if (updatedAt > 0) {
-      url += '&updated_at=${updatedAt - 600}';
+      url += '&updated_at=${updatedAt - kUpdatedAtBufferSeconds}';
     }
 
     final dynamic response = await webClient.get(url, company.token);