diff --git a/server/config/log4.js b/server/config/log4.js
index 0c9b467..54e7326 100644
--- a/server/config/log4.js
+++ b/server/config/log4.js
@@ -6,7 +6,9 @@ const log_config = {
       "type": "dateFile",
       "filename": "logs/app",
       "pattern": "yyyy-MM-dd.log",
-      "alwaysIncludePattern": true
+      "alwaysIncludePattern": true,
+      "numBackups": 7, // the number of old files that matches the pattern to keep (excluding the hot file).
+      "compress": true,
     }
     // "everything": {
     //   "type": "multiFile",