diff --git a/application/admin/command/Crud/stubs/mixins/checkbox.stub b/application/admin/command/Crud/stubs/mixins/checkbox.stub
index ba87ac81..19758e0f 100644
--- a/application/admin/command/Crud/stubs/mixins/checkbox.stub
+++ b/application/admin/command/Crud/stubs/mixins/checkbox.stub
@@ -2,7 +2,7 @@
     public function {%methodName%}($value, $data)
     {
         $value = $value ?: ($data['{%field%}'] ?? '');
-        $valueArr = explode(',', $value);
+        $valueArr = explode(',', (string) $value);
         $list = $this->{%listMethodName%}();
         return implode(',', array_intersect_key($list, array_flip($valueArr)));
     }
\ No newline at end of file