diff --git a/app/Imports/EventCalendarImport.php b/app/Imports/EventCalendarImport.php
index 05c83a4..402f557 100644
--- a/app/Imports/EventCalendarImport.php
+++ b/app/Imports/EventCalendarImport.php
@@ -32,11 +32,11 @@ class EventCalendarImport implements ToModel
             $this->index += 1;
             return;
         }
-        $pattern_name = $row[1];
-        $start_date = $row[2];
-        $start_time = $row[3];
-        $end_date = $row[4];
-        $end_time = $row[5];
+        $pattern_name = $row[1] ?? '';
+        $start_date = $row[2] ?? '';
+        $start_time = $row[3] ?? '';
+        $end_date = $row[4] ?? '';
+        $end_time = $row[5] ?? '';
         if (empty($pattern_name)) {
             $this->error[] = imports_error($this->index, 'import3');
             return;