diff --git a/app/Helpers/Invoice/InvoiceSum.php b/app/Helpers/Invoice/InvoiceSum.php
index d3e54e607861..3a9d4bab6685 100644
--- a/app/Helpers/Invoice/InvoiceSum.php
+++ b/app/Helpers/Invoice/InvoiceSum.php
@@ -160,16 +160,16 @@ class InvoiceSum
     {
         $this->total += $this->total_taxes;
 
-        if($this->invoice->custom_value1 > 0)
+        if(is_numeric($this->invoice->custom_value1) && $this->invoice->custom_value1 > 0)
             $this->total += $this->invoice->custom_value1;
 
-        if($this->invoice->custom_value2 > 0)
+        if(is_numeric($this->invoice->custom_value2) && $this->invoice->custom_value2 > 0)
             $this->total += $this->invoice->custom_value2;
 
-        if($this->invoice->custom_value3 > 0)
+        if(is_numeric($this->invoice->custom_value3) && $this->invoice->custom_value3 > 0)
             $this->total += $this->invoice->custom_value3;
 
-        if($this->invoice->custom_value4 > 0)
+        if(is_numeric($this->invoice->custom_value4) && $this->invoice->custom_value4 > 0)
             $this->total += $this->invoice->custom_value4;
 
         return $this;
diff --git a/app/Helpers/Invoice/InvoiceSumInclusive.php b/app/Helpers/Invoice/InvoiceSumInclusive.php
index 20f10b609aba..95d2492b7354 100644
--- a/app/Helpers/Invoice/InvoiceSumInclusive.php
+++ b/app/Helpers/Invoice/InvoiceSumInclusive.php
@@ -172,16 +172,16 @@ class InvoiceSumInclusive
     {
         //$this->total += $this->total_taxes;
 
-        if($this->invoice->custom_value1 > 0)
+        if(is_numeric($this->invoice->custom_value1) && $this->invoice->custom_value1 > 0)
             $this->total += $this->invoice->custom_value1;
 
-        if($this->invoice->custom_value2 > 0)
+        if(is_numeric($this->invoice->custom_value2) && $this->invoice->custom_value2 > 0)
             $this->total += $this->invoice->custom_value2;
 
-        if($this->invoice->custom_value3 > 0)
+        if(is_numeric($this->invoice->custom_value3) && $this->invoice->custom_value3 > 0)
             $this->total += $this->invoice->custom_value3;
 
-        if($this->invoice->custom_value4 > 0)
+        if(is_numeric($this->invoice->custom_value4) && $this->invoice->custom_value4 > 0)
             $this->total += $this->invoice->custom_value4;     
 
         return $this;
diff --git a/app/Jobs/Util/Import.php b/app/Jobs/Util/Import.php
index c83d8c214b40..5e26f3ceb784 100644
--- a/app/Jobs/Util/Import.php
+++ b/app/Jobs/Util/Import.php
@@ -128,7 +128,7 @@ class Import implements ShouldQueue
         'task_statuses',
         'expenses',
         'tasks',
-        'documents',
+        // 'documents',
     ];
 
     /**