diff --git a/README.md b/README.md
index 5c94cc7..1baf894 100644
--- a/README.md
+++ b/README.md
@@ -167,8 +167,8 @@ a simple, but elegant wrapper around [Spout](https://github.com/box/spout) with
 of simplifying **imports and exports**.
 
 It could be considered as a faster (and memory friendly) alternative
-to [Laravel Excel](https://laravel-excel.maatwebsite.nl/), with **many less** features.
-Use it only for very simple tasks.
+to [Laravel Excel](https://laravel-excel.maatwebsite.nl/), with less features.
+Use it only for simple tasks.
 
 ## Benchmarks
 
diff --git a/composer.json b/composer.json
index 59d65eb..3cee064 100644
--- a/composer.json
+++ b/composer.json
@@ -2,10 +2,11 @@
   "name": "rap2hpoutre/fast-excel",
   "type": "library",
   "keywords": ["laravel", "excel", "csv", "xls", "xlsx"],
+  "description": "Fast Excel import/export for Laravel",
   "require": {
     "php": "^7.0",
-    "illuminate/database": "5.3.* || 5.4.* || 5.5.* || 5.6.* || 5.7.*",
-    "illuminate/support": "5.3.* || 5.4.* || 5.5.* || 5.6.* || 5.7.*",
+    "illuminate/database": "5.3.* || 5.4.* || 5.5.* || 5.6.* || 5.7.* || 5.8.*",
+    "illuminate/support": "5.3.* || 5.4.* || 5.5.* || 5.6.* || 5.7.* || 5.8.*",
     "box/spout": "^2.7"
   },
   "require-dev": {
diff --git a/src/Importable.php b/src/Importable.php
index d8907ce..5bd12cb 100644
--- a/src/Importable.php
+++ b/src/Importable.php
@@ -122,7 +122,13 @@ private function importSheet(SheetInterface $sheet, callable $callback = null)
                 } elseif ($count_header < $count_row = count($row)) {
                     $row = array_slice($row, 0, $count_header);
                 }
-                $collection[] = $callback ? $callback(array_combine($headers, $row)) : array_combine($headers, $row);
+                if ($callback) {
+                    if ($result = $callback(array_combine($headers, $row))) {
+                        $collection[] = $result;
+                    }
+                } else {
+                    $collection[] = array_combine($headers, $row);
+                }
             }
         } else {
             foreach ($sheet->getRowIterator() as $row) {
@@ -138,14 +144,16 @@ private function importSheet(SheetInterface $sheet, callable $callback = null)
      *
      * @return array
      */
-    private function toStrings($values) {
+    private function toStrings($values)
+    {
         foreach ($values as &$value) {
             if ($value instanceof \Datetime) {
                 $value = $value->format('Y-m-d H:i:s');
             } elseif ($value) {
-                $value = (string)$value;
+                $value = (string) $value;
             }
         }
+
         return $values;
     }
 }