diff --git a/lib/util.js b/lib/util.js
index ab3c8921..51baf480 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -724,6 +724,10 @@ _.write = function(path, data, charset, append) {
   if (!_exists(path)) {
     _.mkdir(_.pathinfo(path).dirname);
   }
+  // 兼容 nodejs v14 及后续版本
+  if (data === undefined || data === null || typeof data === 'number') {
+    data += '';
+  }
   if (charset) {
     data = getIconv().encode(data, charset);
   }