diff --git a/Cargo.toml b/Cargo.toml
index cda43fe..dad8a07 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ members = [
 
 [package]
 name = "cdbc"
-version = "0.1.12"
+version = "0.1.13"
 edition = "2021"
 authors = ["zhuxiujia@qq.com"]
 description = "Rust Coroutine Database Driver Connectivity"
@@ -18,7 +18,8 @@ license = "Apache-2.0"
 
 [features]
 default = []
-_tls-native-tls = []
+
+#native-tls
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [dependencies]
@@ -32,6 +33,6 @@ log = { version = "0.4.8", default-features = false }
 crossbeam-queue = "0.3.1"
 either = {version = "1.5.3",features = ["serde"]}
 bstr = { version = "0.2.14", default-features = false, features = ["std"] }
-native-tls = {version ="0.2"}
+native-tls = {version ="0.2",optional = true}
 ahash = "0.7.2"
 serde_json = { version = "1.0.51", features = ["raw_value"]}
diff --git a/cdbc-mysql/Cargo.toml b/cdbc-mysql/Cargo.toml
index fac2ee2..52ac1cc 100644
--- a/cdbc-mysql/Cargo.toml
+++ b/cdbc-mysql/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cdbc-mysql"
-version = "0.1.12"
+version = "0.1.13"
 edition = "2021"
 authors = ["zhuxiujia@qq.com"]
 description = "Rust Coroutine Database Driver Connectivity"
@@ -8,7 +8,7 @@ repository = "https://github.com/co-rs/cdbc"
 license = "Apache-2.0"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [features]
-default = ["offline","time"]
+default = ["cdbc","offline", "time"]
 offline = ["serde", "either/serde"]
 _tls-native-tls = []
 
@@ -25,29 +25,30 @@ bigdecimal = ["bigdecimal_", "num-bigint"]
 decimal = ["rust_decimal", "num-bigint"]
 json = ["serde", "serde_json"]
 
+native-tls = ["cdbc/native-tls"]
+
 [dependencies]
-cdbc = { version = "0.1.12", path = "../"}
+cdbc = { version = "0.1.13", path = "../", optional = true }
 
 cogo = "0.1"
 hashlink = "0.7.0"
 thiserror = "1.0.30"
 bytes = '1.0.0'
 memchr = "2.3.4"
-serde={version = "1.0.130" ,optional = true}
+serde = { version = "1.0.130", optional = true }
 log = { version = "0.4.8", default-features = false }
 
 either = "1.5.3"
 bstr = { version = "0.2.14", default-features = false, features = ["std"] }
-native-tls = {version ="0.2"}
-generic-array = {version ="^0.14.4",features = ["serde"]}
-rand = {version = "0.8.4",features = ["std","serde"]}
-rsa = {version = "0.5.0",features = ["std","serde","serde_crate"]}
-sha-1 = {version = "0.9.0", default-features = false}
-sha2 = {version = "0.9.0", default-features = false}
-base64 = {version="0.13.0",features = ["std"]}
-digest = {version = "0.9.0"}
+generic-array = { version = "^0.14.4", features = ["serde"] }
+rand = { version = "0.8.4", features = ["std", "serde"] }
+rsa = { version = "0.5.0", features = ["std", "serde", "serde_crate"] }
+sha-1 = { version = "0.9.0", default-features = false }
+sha2 = { version = "0.9.0", default-features = false }
+base64 = { version = "0.13.0", features = ["std"] }
+digest = { version = "0.9.0" }
 smallvec = "1.7.0"
-byteorder = { version = "1.3.4",  features = ["std"] }
+byteorder = { version = "1.3.4", features = ["std"] }
 ahash = "0.7.2"
 percent-encoding = "2.1.0"
 url = { version = "2.1.1" }
diff --git a/cdbc-mysql/src/connection/tls.rs b/cdbc-mysql/src/connection/tls.rs
index ada1eeb..e95a436 100644
--- a/cdbc-mysql/src/connection/tls.rs
+++ b/cdbc-mysql/src/connection/tls.rs
@@ -47,6 +47,10 @@ fn upgrade(stream: &mut MySqlStream, options: &MySqlConnectOptions) -> Result<bo
     );
     let accept_invalid_host_names = !matches!(options.ssl_mode, MySqlSslMode::VerifyIdentity);
 
+    if !cfg!(feature = "native-tls")  {
+        return Result::Err(Error::from("must enable native-tls!"));
+    }
+    #[cfg(feature = "native-tls")]
     stream
         .upgrade(
             &options.host,
diff --git a/cdbc-pg/Cargo.toml b/cdbc-pg/Cargo.toml
index 41c3cb5..45d9a7c 100644
--- a/cdbc-pg/Cargo.toml
+++ b/cdbc-pg/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cdbc-pg"
-version = "0.1.12"
+version = "0.1.13"
 edition = "2021"
 authors = ["zhuxiujia@qq.com"]
 description = "Rust Coroutine Database Driver Connectivity"
@@ -42,7 +42,7 @@ json = ["serde", "serde_json"]
 offline = ["json"]
 
 [dependencies]
-cdbc = { version = "0.1.12", path = "../"}
+cdbc = { version = "0.1.13", path = "../"}
 
 atoi = "0.4.0"
 smallvec = "1.4.0"
@@ -56,7 +56,6 @@ log = { version = "0.4.8", default-features = false }
 
 serde_json = { version = "1.0.51", features = ["raw_value"], optional = true }
 
-native-tls = {version ="0.2"}
 either = "1.5.3"
 md-5 = { version = "0.9.0", default-features = false, optional = true }
 sha2 = { version = "0.9.0", default-features = false, optional = true }
diff --git a/cdbc-pg/src/connection/tls.rs b/cdbc-pg/src/connection/tls.rs
index 9d602ac..5831c89 100644
--- a/cdbc-pg/src/connection/tls.rs
+++ b/cdbc-pg/src/connection/tls.rs
@@ -65,8 +65,11 @@ fn upgrade(stream: &mut PgStream, options: &PgConnectOptions) -> Result<bool, Er
     );
     let accept_invalid_hostnames = !matches!(options.ssl_mode, PgSslMode::VerifyFull);
 
-    stream
-        .upgrade(
+    if !cfg!(feature = "native-tls")  {
+        return cdbc::Result::Err(Error::from("must enable native-tls!"));
+    }
+    #[cfg(feature = "native-tls")]
+    stream.upgrade(
             &options.host,
             accept_invalid_certs,
             accept_invalid_hostnames,
diff --git a/cdbc-sqlite/Cargo.toml b/cdbc-sqlite/Cargo.toml
index c9e7cbc..6242e80 100644
--- a/cdbc-sqlite/Cargo.toml
+++ b/cdbc-sqlite/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cdbc-sqlite"
-version = "0.1.12"
+version = "0.1.13"
 edition = "2021"
 authors = ["zhuxiujia@qq.com"]
 description = "Rust Coroutine Database Driver Connectivity"
@@ -10,7 +10,6 @@ license = "Apache-2.0"
 [features]
 default = ["sqlite","offline"]
 offline = []
-_tls-native-tls = []
 json= ["serde","serde_json"]
 
 sqlite = ["libsqlite3-sys","json"]
@@ -23,7 +22,7 @@ all-types = [
 [dependencies]
 
 cogo = "0.1"
-cdbc = { version = "0.1.12", path = "../"}
+cdbc = { version = "0.1.13", path = "../"}
 serde={version = "1.0.130" ,features = ["derive", "rc"],optional = true}
 serde_json = { version = "1.0.51", features = ["raw_value"], optional = true }
 log = { version = "0.4.8", default-features = false }
diff --git a/src/error.rs b/src/error.rs
index 7fdfe3f..7cbc9fe 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -10,7 +10,6 @@ use std::result::Result as StdResult;
 use std::sync::mpsc::{RecvError, SendError};
 use std::sync::PoisonError;
 use cogo::std::sync::channel;
-use native_tls::HandshakeError;
 use crate::database::Database;
 use crate::type_info::TypeInfo;
 use crate::types::Type;
diff --git a/src/net/tls/mod.rs b/src/net/tls/mod.rs
index c2ff04f..dc839f6 100644
--- a/src/net/tls/mod.rs
+++ b/src/net/tls/mod.rs
@@ -9,7 +9,6 @@ use std::task::{Context, Poll};
 
 use crate::error::Error;
 use std::mem::replace;
-use native_tls::HandshakeError;
 use crate::decode::Decode;
 use crate::encode::Encode;
 use crate::net::socket::IsTLS;
@@ -57,9 +56,11 @@ impl std::fmt::Display for CertificateInput {
 }
 
 
+#[cfg(feature = "native-tls")]
 pub struct TlsStream<S>{
     pub inner:native_tls::TlsStream<S>
 }
+#[cfg(feature = "native-tls")]
 impl <S>Deref for TlsStream<S>{
     type Target = native_tls::TlsStream<S>;
 
@@ -67,6 +68,7 @@ impl <S>Deref for TlsStream<S>{
         &self.inner
     }
 }
+#[cfg(feature = "native-tls")]
 impl <S>DerefMut for TlsStream<S>{
     fn deref_mut(&mut self) -> &mut Self::Target {
         &mut self.inner
@@ -80,6 +82,7 @@ where
     S: std::io::Read + std::io::Write,
 {
     Raw(S),
+    #[cfg(feature = "native-tls")]
     Tls(TlsStream<S>),
     Upgrading,
 }
@@ -89,6 +92,7 @@ impl<S> MaybeTlsStream<S>
 where
     S: std::io::Read + std::io::Write  + std::fmt::Debug + Send +Sync + 'static,
 {
+    #[cfg(feature = "native-tls")]
     pub fn upgrade(
         &mut self,
         host: &str,
@@ -135,11 +139,17 @@ where
 impl <S>IsTLS for MaybeTlsStream<S> where S:Write+Read{
     #[inline]
     fn is_tls(&self) -> bool {
-        matches!(self, Self::Tls(_))
+        if !cfg!(feature = "native-tls")  {
+            return false;
+        }else{
+            #[cfg(feature = "native-tls")]
+            return matches!(self, Self::Tls(_));
+        }
+        return false;
     }
 }
 
-// #[cfg(feature = "_tls-native-tls")]
+#[cfg(feature = "native-tls")]
 fn configure_tls_connector(
     accept_invalid_certs: bool,
     accept_invalid_hostnames: bool,
@@ -185,6 +195,7 @@ where
     fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
         match &mut *self {
             MaybeTlsStream::Raw(s) => s.read(buf),
+            #[cfg(feature = "native-tls")]
             MaybeTlsStream::Tls(s) => s.read(buf),
             MaybeTlsStream::Upgrading => Err(io::ErrorKind::ConnectionAborted.into()),
         }
@@ -198,8 +209,8 @@ where
     fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
         match self {
             MaybeTlsStream::Raw(s) => s.write( buf),
+            #[cfg(feature = "native-tls")]
             MaybeTlsStream::Tls(s) => s.write( buf),
-
             MaybeTlsStream::Upgrading => Err(io::ErrorKind::ConnectionAborted.into()),
         }
     }
@@ -207,6 +218,7 @@ where
     fn flush(&mut self) -> std::io::Result<()> {
         match self {
             MaybeTlsStream::Raw(s) => s.flush(),
+            #[cfg(feature = "native-tls")]
             MaybeTlsStream::Tls(s) => s.flush(),
 
             MaybeTlsStream::Upgrading => Err(io::ErrorKind::ConnectionAborted.into()),
@@ -224,7 +236,7 @@ where
     fn deref(&self) -> &Self::Target {
         match self {
             MaybeTlsStream::Raw(s) => s,
-
+            #[cfg(feature = "native-tls")]
             MaybeTlsStream::Tls(s) => s.get_ref(),
 
             MaybeTlsStream::Upgrading => {
@@ -241,7 +253,7 @@ where
     fn deref_mut(&mut self) -> &mut Self::Target {
         match self {
             MaybeTlsStream::Raw(s) => s,
-
+            #[cfg(feature = "native-tls")]
             MaybeTlsStream::Tls(s) => s.get_mut(),
 
             MaybeTlsStream::Upgrading => {