diff --git a/app/Http/Controllers/OpenAPI/ClientSchema.php b/app/Http/Controllers/OpenAPI/ClientSchema.php
index ff3fb6d1862e..b343e62b26b7 100644
--- a/app/Http/Controllers/OpenAPI/ClientSchema.php
+++ b/app/Http/Controllers/OpenAPI/ClientSchema.php
@@ -26,6 +26,7 @@
  *       @OA\Property(property="city", type="string", example="", description="________"),
  *       @OA\Property(property="state", type="string", example="", description="________"),
  *       @OA\Property(property="postal_code", type="string", example="", description="________"),
+ *       @OA\Property(property="phone", type="string", example="555-3434-3434", description="The client phone number"),
  *       @OA\Property(property="country_id", type="string", example="", description="________"),
  *       @OA\Property(property="custom_value1", type="string", example="", description="________"),
  *       @OA\Property(property="custom_value2", type="string", example="", description="________"),
diff --git a/app/Transformers/InvoiceTransformer.php b/app/Transformers/InvoiceTransformer.php
index 7cc0b82771ea..c6cac02452cd 100644
--- a/app/Transformers/InvoiceTransformer.php
+++ b/app/Transformers/InvoiceTransformer.php
@@ -83,8 +83,8 @@ class InvoiceTransformer extends EntityTransformer
     {
         return [
             'id' => $this->encodePrimaryKey($invoice->id),
-            'amount' => (float) $invoice->amount ?: '',
-            'balance' => (float) $invoice->balance ?: '',
+            'amount' => (float) $invoice->amount,
+            'balance' => (float) $invoice->balance,
             'client_id' => (string) $this->encodePrimaryKey($invoice->client_id),
             'status_id' => (string) ($invoice->status_id ?: 1),
             'design_id' => (string) ($invoice->design_id ?: 1),