diff --git a/bfcodegen/csid-generate.template b/bfcodegen/csid-generate.template
index 9c1aa8b..b141d64 100644
--- a/bfcodegen/csid-generate.template
+++ b/bfcodegen/csid-generate.template
@@ -167,7 +167,10 @@ func (id {{.Name}}) Valid() error {
 	return validateID(prefix{{.Name}}, string(id))
 }
 
-func (i {{.Name}}) String() string {
+func (i *{{.Name}}) String() string {
+    if i == nil {
+        return "<nil>"
+    }
 	return string(i)
 }
 
diff --git a/bfcodegen/enum-generate.template b/bfcodegen/enum-generate.template
index ec6fbd8..e3915b2 100644
--- a/bfcodegen/enum-generate.template
+++ b/bfcodegen/enum-generate.template
@@ -69,7 +69,10 @@ func (e {{.EnumTypeName}}) ValuesMeta() []enums.EnumMetaValue {
 }
 
 {{if $hasStr}}
-func (e {{.EnumTypeName}}) String() string {
+func (e *{{.EnumTypeName}}) String() string {
+    if i == nil {
+        return "<nil>"
+    }
 	return string(e)
 }
 {{end}}
diff --git a/bfcodegen/id-generate.template b/bfcodegen/id-generate.template
index 7111fe4..1181a93 100644
--- a/bfcodegen/id-generate.template
+++ b/bfcodegen/id-generate.template
@@ -21,7 +21,10 @@ func (i {{.Name}}) MarshalBSONValue() (bsontype.Type, []byte, error) {
 	}
 }
 
-func (i {{.Name}}) String() string {
+func (i *{{.Name}}) String() string {
+    if i == nil {
+        return "<nil>"
+    }
 	return string(i)
 }
 
diff --git a/go.mod b/go.mod
index 9f59a89..9d19e0f 100644
--- a/go.mod
+++ b/go.mod
@@ -22,11 +22,11 @@ require (
 
 require (
 	github.com/bytedance/sonic v1.12.3 // indirect
-	github.com/bytedance/sonic/loader v0.2.0 // indirect
+	github.com/bytedance/sonic/loader v0.2.1 // indirect
 	github.com/cloudwego/base64x v0.1.4 // indirect
 	github.com/cloudwego/iasm v0.2.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/gabriel-vasile/mimetype v1.4.5 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.6 // indirect
 	github.com/gin-contrib/sse v0.1.0 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
diff --git a/go.sum b/go.sum
index b996de0..6148d18 100644
--- a/go.sum
+++ b/go.sum
@@ -6,6 +6,8 @@ github.com/bytedance/sonic v1.12.3/go.mod h1:B8Gt/XvtZ3Fqj+iSKMypzymZxw/FVwgIGKz
 github.com/bytedance/sonic/loader v0.1.1/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU=
 github.com/bytedance/sonic/loader v0.2.0 h1:zNprn+lsIP06C/IqCHs3gPQIvnvpKbbxyXQP1iU4kWM=
 github.com/bytedance/sonic/loader v0.2.0/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU=
+github.com/bytedance/sonic/loader v0.2.1 h1:1GgorWTqf12TA8mma4DDSbaQigE2wOgQo7iCjjJv3+E=
+github.com/bytedance/sonic/loader v0.2.1/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU=
 github.com/cloudwego/base64x v0.1.4 h1:jwCgWpFanWmN8xoIUHa2rtzmkd5J2plF/dnLS6Xd/0Y=
 github.com/cloudwego/base64x v0.1.4/go.mod h1:0zlkT4Wn5C6NdauXdJRhSKRlJvmclQ1hhJgA0rcu/8w=
 github.com/cloudwego/iasm v0.2.0 h1:1KNIy1I1H9hNNFEEH3DVnI4UujN+1zjpuk6gwHLTssg=
@@ -20,6 +22,8 @@ github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkp
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/gabriel-vasile/mimetype v1.4.5 h1:J7wGKdGu33ocBOhGy0z653k/lFKLFDPJMG8Gql0kxn4=
 github.com/gabriel-vasile/mimetype v1.4.5/go.mod h1:ibHel+/kbxn9x2407k1izTA1S81ku1z/DlgOW2QE0M4=
+github.com/gabriel-vasile/mimetype v1.4.6 h1:3+PzJTKLkvgjeTbts6msPJt4DixhT4YtFNf1gtGe3zc=
+github.com/gabriel-vasile/mimetype v1.4.6/go.mod h1:JX1qVKqZd40hUPpAfiNTe0Sne7hdfKSbOqqmkq8GCXc=
 github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
 github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
 github.com/gin-gonic/gin v1.10.0 h1:nTuyha1TYqgedzytsKYqna+DfLos46nTv2ygFy86HFU=
diff --git a/goextVersion.go b/goextVersion.go
index f6f8593..42d5da4 100644
--- a/goextVersion.go
+++ b/goextVersion.go
@@ -1,5 +1,5 @@
 package goext
 
-const GoextVersion = "0.0.532"
+const GoextVersion = "0.0.533"
 
-const GoextVersionTimestamp = "2024-10-13T16:33:39+0200"
+const GoextVersionTimestamp = "2024-10-22T09:36:40+0200"