diff --git a/log/log.go b/log/log.go
index 17ed5ef..15c48c1 100644
--- a/log/log.go
+++ b/log/log.go
@@ -8,15 +8,17 @@ import (
 	"os"
 	"time"
 
+	"github.com/rs/zerolog"
 	"tuxpa.in/a/zlog"
 )
 
 // Logger is the global logger.
-var Logger = zlog.New(os.Stderr).With().Timestamp().Logger()
-
-func init() {
-	zlog.TimeFieldFormat = time.StampMicro
-}
+var Logger = zlog.New(nil).Output(
+	zerolog.ConsoleWriter{
+		Out:        os.Stderr,
+		TimeFormat: time.RFC3339,
+	},
+).With().Timestamp().Logger()
 
 // Output duplicates the global logger and sets w as its output.
 func Output(w io.Writer) zlog.Logger {