diff --git a/easytier/Cargo.toml b/easytier/Cargo.toml
index bb49807c..47ebe13a 100644
--- a/easytier/Cargo.toml
+++ b/easytier/Cargo.toml
@@ -51,7 +51,7 @@ toml = "0.8.12"
 chrono = { version = "0.4.37", features = ["serde"] }
 
 getset = "0.1.6"
-optional_struct = "0.5.2"
+optionize = "0.1"
 
 guarden = "0.1"
 
diff --git a/easytier/src/common/config.rs b/easytier/src/common/config.rs
index 0bf3a28f..370fbcd1 100644
--- a/easytier/src/common/config.rs
+++ b/easytier/src/common/config.rs
@@ -7,18 +7,18 @@ use crate::{
         api::manage::ConfigSource as RpcConfigSource,
         common::{CompressionAlgoPb, PortForwardConfigPb, SecureModeConfig, SocketType},
     },
-    tunnel::{IpScheme, TunnelScheme, generate_digest_from_str},
+    tunnel::{generate_digest_from_str, IpScheme, TunnelScheme},
     utils,
 };
 use anyhow::Context;
-use base64::{Engine as _, prelude::BASE64_STANDARD};
+use base64::{prelude::BASE64_STANDARD, Engine as _};
 use bon::Builder;
-use clap::ValueEnum;
 use clap::builder::PossibleValue;
+use clap::ValueEnum;
 use derivative::Derivative;
 use derive_more::{Constructor, Deref};
 use getset::Getters;
-use optional_struct::Applicable;
+use optionize::Optionized;
 use serde::{Deserialize, Serialize};
 use std::fmt::{Debug, Display};
 use std::{
@@ -38,7 +38,7 @@ use tokio::io::AsyncReadExt as _;
 )]
 pub struct ConfigBase<Raw, Parsed, Data = ()>
 where
-    Raw: Applicable<Base = Parsed>,
+    Raw: Optionized<Parsed>,
     ConfigBase<Raw, Parsed, Data>: TryFrom<Raw>,
 {
     #[deref]
@@ -53,7 +53,7 @@ where
 
 impl<Raw, Parsed, Data> Serialize for ConfigBase<Raw, Parsed, Data>
 where
-    Raw: Applicable<Base = Parsed> + Serialize,
+    Raw: Optionized<Parsed> + Serialize,
     ConfigBase<Raw, Parsed, Data>: TryFrom<Raw, Error: Debug>,
 {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
@@ -66,7 +66,7 @@ where
 
 impl<Raw, Parsed, Data> Default for ConfigBase<Raw, Parsed, Data>
 where
-    Raw: Applicable<Base = Parsed> + Default,
+    Raw: Optionized<Parsed> + Default,
     ConfigBase<Raw, Parsed, Data>: TryFrom<Raw, Error: Debug>,
 {
     fn default() -> Self {
@@ -76,7 +76,7 @@ where
 
 impl<Raw, Parsed, Data> ConfigBase<Raw, Parsed, Data>
 where
-    Raw: Applicable<Base = Parsed>,
+    Raw: Optionized<Parsed>,
     ConfigBase<Raw, Parsed, Data>: TryFrom<Raw, Error: Debug>,
 {
     pub fn into_parsed(self) -> Parsed {
@@ -93,7 +93,7 @@ where
 
     pub fn update(self, config: Raw) -> Result<Self, <Self as TryFrom<Raw>>::Error> {
         let mut raw = self.into_raw();
-        config.apply_to_opt(&mut raw);
+        raw.merge(config);
         raw.try_into()
     }
 }
diff --git a/easytier/src/dns/config/dns.rs b/easytier/src/dns/config/dns.rs
index 5f129ecd..8c344d3c 100644
--- a/easytier/src/dns/config/dns.rs
+++ b/easytier/src/dns/config/dns.rs
@@ -5,19 +5,21 @@ use crate::dns::config::{DNS_DEFAULT_ADDRESSES, DNS_DEFAULT_DOMAIN};
 use crate::dns::utils::addr::NameServerAddrGroup;
 use crate::proto::dns::GetExportConfigResponse;
 use hickory_proto::rr::LowerName;
-use optional_struct::{Applicable, optional_struct};
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
+use optionize::{optionized, Optionizable};
 
-#[optional_struct(DnsConfigRaw)]
+#[optionized]
+#[optionize(name = "DnsConfigRaw")]
 #[derive(Debug, Clone, Default, PartialEq, Deserialize, Serialize)]
 pub struct DnsConfigParsed {
     pub disabled: bool,
     #[serde(rename = "zone")]
     pub zones: Vec<ZoneConfig>,
-    #[optional_skip_wrap]
+    #[optionize(flatten)]
     #[serde(flatten)]
     pub policies: HashMap<LowerName, DnsPolicyConfig>,
+    #[optionize(flatten)]
     pub name: Option<LowerName>,
     pub domain: LowerName,
     pub addresses: NameServerAddrGroup,
@@ -28,13 +30,12 @@ pub type DnsConfig = ConfigBase<DnsConfigRaw, DnsConfigParsed, ()>;
 
 impl From<DnsConfigRaw> for DnsConfig {
     fn from(raw: DnsConfigRaw) -> Self {
-        let default = DnsConfigParsed {
+        let mut parsed = DnsConfigParsed {
             domain: DNS_DEFAULT_DOMAIN.clone(),
             addresses: DNS_DEFAULT_ADDRESSES.clone(),
             ..Default::default()
         };
-
-        let parsed = raw.clone().build(default);
+        parsed.load(raw.clone());
         Self::new(parsed, raw, ())
     }
 }
diff --git a/easytier/src/dns/config/zone.rs b/easytier/src/dns/config/zone.rs
index 7ed62a58..a254b3b1 100644
--- a/easytier/src/dns/config/zone.rs
+++ b/easytier/src/dns/config/zone.rs
@@ -7,11 +7,11 @@ use derive_more::From;
 use hickory_proto::op::ResponseCode;
 use hickory_proto::rr::LowerName;
 use maplit::hashset;
-use optional_struct::{Applicable, optional_struct};
 use serde::{Deserialize, Serialize};
 use std::collections::HashSet;
 use std::convert::TryFrom;
 use std::net::{Ipv4Addr, Ipv6Addr};
+use optionize::{optionized, Optionizable};
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Hash, From, Deserialize, Serialize)]
 #[serde(untagged)]
@@ -38,15 +38,16 @@ impl From<i32> for Fallthrough {
     }
 }
 
-#[optional_struct(ZoneConfigRaw)]
+#[optionized]
+#[optionize(name = "ZoneConfigRaw")]
 #[derive(Debug, Clone, Default, PartialEq, Deserialize, Serialize)]
 pub struct ZoneConfigParsed {
-    #[optional_skip_wrap]
+    #[optionize(flatten)]
     pub origin: LowerName,
     pub ttl: u32,
     pub records: Vec<String>,
     pub forwarders: NameServerAddrGroup,
-    #[optional_skip_wrap]
+    #[optionize(flatten)]
     #[serde(flatten)]
     pub policy: ZonePolicyConfig,
     pub fallthrough: HashSet<Fallthrough>,
@@ -70,15 +71,13 @@ impl TryFrom<ZoneConfigRaw> for ZoneConfig {
     type Error = anyhow::Error;
 
     fn try_from(raw: ZoneConfigRaw) -> Result<Self, Self::Error> {
-        let default = ZoneConfigParsed {
+        let mut parsed = ZoneConfigParsed {
             fallthrough: hashset! {Fallthrough::Any},
             ..Default::default()
         };
-
-        let parsed = raw.clone().build(default);
+        parsed.load(raw.clone());
         let data = (&parsed).into();
         let _ = Zone::try_from(&data)?; // validation
-
         Ok(Self::new(parsed, raw, data))
     }
 }