diff --git a/rel/files/app.config b/rel/files/app.config
index 1d70835d3..c436baf7b 100644
--- a/rel/files/app.config
+++ b/rel/files/app.config
@@ -16,8 +16,18 @@
 	{handlers, [
 		{lager_console_backend, info},
 		{lager_file_backend, [
-			{"log/emqtt_error.log", error, 10485760, "$D0", 5},
-			{"log/emqtt_info.log", info, 10485760, "$D0", 5}
+			{file, "log/emqtt_error.log"},
+			{level, error},
+			{size, 10485760},
+			{date, "$D0"},
+			{count, 5}
+		]},
+		{lager_file_backend, [
+			{file, "log/emqtt_info.log"},
+			{level, info},
+			{size, 10485760},
+			{date, "$D0"},
+			{count, 5}
 		]}
 	]}
  ]},