diff --git a/lib/custom_logger.js b/lib/custom_logger.js
index 218c803aa3ef5875eeb26015d52ac5536704ef89..d596fcd21974e1f7885a40ce8ac9529e0cdbad46 100644
--- a/lib/custom_logger.js
+++ b/lib/custom_logger.js
@@ -10,10 +10,6 @@
 var logger = require('express').logger;
 
 logger.format('default_bid',
-    ':remote-addr - - :date-millis ":method :url HTTP/:http-version" :status :response-time :res[content-length] ":referrer" ":user-agent"');
+    ':remote-addr - - ":method :url HTTP/:http-version" :status :res[content-length] ":referrer" ":user-agent"');
 
-logger.format('dev_bid', ':date-millis :method :url :status :response-time');
-
-logger.token('date-millis', function (req) {
-  return '[' + req._startTime.toISOString() + ']';
-});
\ No newline at end of file
+logger.format('dev_bid', 'AOK :method :url :status :response-time');
\ No newline at end of file