diff --git a/src/logger.js b/src/logger.js
index cb57ae5..5fd9b36 100644
--- a/src/logger.js
+++ b/src/logger.js
@@ -1,11 +1,14 @@
 const log4js = require('log4js')
 const paths = require('./paths')
 
+const kb = 1024
+const mb = 1024*kb
 const config = {
   appenders: {
     everything: {
       type: 'file',
       filename: paths.logfile,
+      maxLogSize: 2*mb,
       layout: { type: 'pattern', pattern: '%d{yyyy-MM-dd hh:mm:ss} %p %m' },
     },
     console: {
@@ -15,6 +18,7 @@ const config = {
     bad: {
       type: 'file',
       filename: paths.logfileBad,
+      maxLogSize: 2*mb,
       layout: { type: 'pattern', pattern: '%d{yyyy-MM-dd hh:mm:ss} %p %m' },
     },
     badFilter: { type: 'logLevelFilter', appender: 'bad', level: 'warn' },