diff --git a/id.go b/id.go
index bec781c..eaada4e 100644
--- a/id.go
+++ b/id.go
@@ -15,5 +15,5 @@ func initID() (err error) {
 
 func NextID() string {
 	id := generator.Next()
-	return hex.EncodeToString(id[:4])
+	return hex.EncodeToString(id[:])
 }