diff --git a/main.go b/main.go
index 43151c3..66dc2e0 100644
--- a/main.go
+++ b/main.go
@@ -21,8 +21,8 @@ var (
 	app      = kingpin.New("cpu_ctrl", "Interactive CPU fan controller").Author("Sangbum Kim")
 	verbose  = app.Flag("verbose", "Enable verbose mode.").Short('v').Bool()
 	P        = app.Flag("proportional-gain", "Set proportional gain value.").Short('p').Default("1.5").Float64()
-	I        = app.Flag("integral-gain", "Set integral gain value.").Short('i').Default("0.3").Float64()
-	D        = app.Flag("derivative-gain", "Set derivative gain value.").Short('d').Default("1.0").Float64()
+	I        = app.Flag("integral-gain", "Set integral gain value.").Short('i').Default("0.4").Float64()
+	D        = app.Flag("derivative-gain", "Set derivative gain value.").Short('d').Default("2.0").Float64()
 	SetPoint = app.Flag("set-point", "Set pointe tempeture").Short('t').Default("38.0").Float64()
 
 	log = logger.NewLogger("cpu_ctrl")