diff --git a/go.mod b/go.mod
index 163d4c5..2fcc7ae 100644
--- a/go.mod
+++ b/go.mod
@@ -1,9 +1,11 @@
 module git.zhangdeman.cn/zhangdeman/serialize
 
-go 1.20
+go 1.21
+
+toolchain go1.21.4
 
 require (
-	git.zhangdeman.cn/zhangdeman/util v0.0.0-20230815042559-b34984be7444
+	git.zhangdeman.cn/zhangdeman/util v0.0.0-20231014142840-445c6407db92
 	github.com/BurntSushi/toml v1.3.2
 	github.com/go-ini/ini v1.67.0
 	gopkg.in/yaml.v3 v3.0.1
diff --git a/go.sum b/go.sum
index d21df3f..13cafbb 100644
--- a/go.sum
+++ b/go.sum
@@ -6,6 +6,8 @@ git.zhangdeman.cn/zhangdeman/util v0.0.0-20230810093304-ccb4045065c4 h1:MgZ2f1Bk
 git.zhangdeman.cn/zhangdeman/util v0.0.0-20230810093304-ccb4045065c4/go.mod h1:tPl6isAsRQLZrX8G3/8fCdhN4OcZypdmdHR/PDkd2PY=
 git.zhangdeman.cn/zhangdeman/util v0.0.0-20230815042559-b34984be7444 h1:JVp575weLUX4sfhgjjxotJPxfHio7Ua8KHH3LMRRs2E=
 git.zhangdeman.cn/zhangdeman/util v0.0.0-20230815042559-b34984be7444/go.mod h1:IqS3vAMyt1fVCWS7RqGeUw1EFnL/ruUMha45G2T+YNM=
+git.zhangdeman.cn/zhangdeman/util v0.0.0-20231014142840-445c6407db92 h1:p1GVRYJc3NNoZeLs4CukitAbM3O/ALNq3l31cnbBQDM=
+git.zhangdeman.cn/zhangdeman/util v0.0.0-20231014142840-445c6407db92/go.mod h1:6OBeuwKy2J1TjdAwStEyC6aYC3kStmJiCg1eFC7g0fk=
 github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8=
 github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=