diff --git a/random/random.go b/random/random.go
index 1705324..1aa5db7 100644
--- a/random/random.go
+++ b/random/random.go
@@ -273,6 +273,9 @@ func nearestPowerOfTwo(cap int) int {
 
 // random generate a random string based on given string range.
 func random(s string, length int) string {
+	// 确保随机数生成器的种子是动态的
+	rand.Seed(time.Now().UnixNano())
+
 	// 仿照strings.Builder
 	// 创建一个长度为 length 的字节切片
 	bytes := make([]byte, length)