diff --git a/app/Factory/TransactionFactory.php b/app/Factory/TransactionFactory.php
index 0b5f3f2aa9..49a1b59ffd 100644
--- a/app/Factory/TransactionFactory.php
+++ b/app/Factory/TransactionFactory.php
@@ -40,7 +40,7 @@ class TransactionFactory
 {
     private Account $account;
     private TransactionCurrency $currency;
-    private TransactionCurrency $foreignCurrency;
+    private ?TransactionCurrency $foreignCurrency;
     private TransactionJournal $journal;
     private bool $reconciled;
     private User $user;
diff --git a/app/Generator/Report/Budget/MonthReportGenerator.php b/app/Generator/Report/Budget/MonthReportGenerator.php
index e44cce9469..e0f43f9dfe 100644
--- a/app/Generator/Report/Budget/MonthReportGenerator.php
+++ b/app/Generator/Report/Budget/MonthReportGenerator.php
@@ -52,7 +52,7 @@ class MonthReportGenerator implements ReportGeneratorInterface
      */
     public function __construct()
     {
-        $this->expenses = new Collection;
+        $this->expenses = [];
     }
 
     /**