diff --git a/ngochess/gtp/gtp.go b/ngochess/gtp/gtp.go
index 4e9591a..e29bc32 100644
--- a/ngochess/gtp/gtp.go
+++ b/ngochess/gtp/gtp.go
@@ -263,7 +263,7 @@ func (e *GtpEngine) KnowCommand(cmd string) bool {
 
 // Komi 设置贴目
 func (e *GtpEngine) Komi(komi float64) bool {
-	cmd := fmt.Sprintf("komi %.1f", komi)
+	cmd := fmt.Sprintf("komi %.2f", komi)
 	resp, err := e.Send(e.nextId(), cmd)
 	if !e.Check(resp, err, cmd) {
 		return false