diff --git a/README.md b/README.md
index 831f4f4..72284da 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,8 @@ IHostBuilder.ConfigureLoggingDefaults()
     },
     "file": {
       "enabled": true,
-      "RetainedFileDays": 30
+      "RetainedFileDays": 30,
+      "FileSizeLimitBytes": 10 //日志文件限制大小（默认10M，单位是M）
     },
     "elasticsearch": {
       "enabled": false,