diff --git a/packages/Webkul/Sales/src/Config/system.php b/packages/Webkul/Sales/src/Config/system.php
index 34bdbbae0..7c6c9830a 100644
--- a/packages/Webkul/Sales/src/Config/system.php
+++ b/packages/Webkul/Sales/src/Config/system.php
@@ -35,7 +35,7 @@ return [
                 'locale_based'  => true,
             ],
             [
-                'name'          => 'order_number_generator-class',
+                'name'          => 'order_number_generator_class',
                 'title'         => 'admin::app.admin.system.order-number-generator-class',
                 'type'          => 'text',
                 'validation'    => false,
@@ -43,10 +43,48 @@ return [
                 'locale_based'  => true,
             ],
         ]
+    ], [
+        'key'    => 'sales.orderSettings.invoice_number',
+        'name'   => 'admin::app.admin.system.invoice-number',
+        'sort'   => 1,
+        'fields' => [
+            [
+                'name'          => 'invoice_number_prefix',
+                'title'         => 'admin::app.admin.system.invoice-number-prefix',
+                'type'          => 'text',
+                'validation'    => false,
+                'channel_based' => true,
+                'locale_based'  => true,
+            ],
+            [
+                'name'          => 'invoice_number_length',
+                'title'         => 'admin::app.admin.system.invoice-number-length',
+                'type'          => 'text',
+                'validation'    => 'numeric',
+                'channel_based' => true,
+                'locale_based'  => true,
+            ],
+            [
+                'name'          => 'invoice_number_suffix',
+                'title'         => 'admin::app.admin.system.invoice-number-suffix',
+                'type'          => 'text',
+                'validation'    => false,
+                'channel_based' => true,
+                'locale_based'  => true,
+            ],
+            [
+                'name'          => 'invoice_number_generator_class',
+                'title'         => 'admin::app.admin.system.invoice-number-generator-class',
+                'type'          => 'text',
+                'validation'    => false,
+                'channel_based' => true,
+                'locale_based'  => true,
+            ],
+        ]
     ], [
         'key'    => 'sales.orderSettings.minimum-order',
         'name'   => 'admin::app.admin.system.minimum-order',
-        'sort'   => 1,
+        'sort'   => 2,
         'fields' => [
             [
                 'name'          => 'minimum_order_amount',
@@ -60,7 +98,7 @@ return [
     ], [
         'key'    => 'sales.orderSettings.invoice_slip_design',
         'name'   => 'admin::app.admin.system.invoice-slip-design',
-        'sort'   => 2,
+        'sort'   => 3,
         'fields' => [
             [
                 'name'          => 'logo',
@@ -71,4 +109,4 @@ return [
             ],
         ]
     ]
-];
\ No newline at end of file
+];
diff --git a/packages/Webkul/Sales/src/Repositories/OrderRepository.php b/packages/Webkul/Sales/src/Repositories/OrderRepository.php
index a46bad069..c02f7dfa8 100755
--- a/packages/Webkul/Sales/src/Repositories/OrderRepository.php
+++ b/packages/Webkul/Sales/src/Repositories/OrderRepository.php
@@ -216,7 +216,7 @@ class OrderRepository extends Repository
         /**
          * @var $generatorClass Sequencer
          */
-        $generatorClass = core()->getConfigData('sales.orderSettings.order_number.order_number_generator-class') ?: false;
+        $generatorClass = core()->getConfigData('sales.orderSettings.order_number.order_number_generator_class') ?: false;
 
         if ($generatorClass !== false
             && class_exists($generatorClass)