diff --git a/code/usr/bin/log_service.py b/code/usr/bin/log_service.py
index 3edae7d..7ea27fd 100644
--- a/code/usr/bin/log_service.py
+++ b/code/usr/bin/log_service.py
@@ -136,7 +136,9 @@ class AbstractFormatUtil(object):
 
 class LogFormatUtil(AbstractFormatUtil):
 
-    def format(self, *args, **kwargs):
+    @classmethod
+    def format(cls, *args, **kwargs):
+        self = LogFormatUtil()
         self.time = args[0]
         self.tag = args[1]
         self.level = args[2]