diff --git a/Cargo.toml b/Cargo.toml
index d6d10fb..4be10cd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ members = ["encrypt-config", "encrypt-config-derive", "tests", "examples"]
 resolver = "2"
 
 [workspace.package]
-version = "0.1.4"
+version = "0.1.5"
 authors = ["Louis <836250617@qq.com>"]
 description = "A rust crate to manage, persist and encrypt your configurations."
 license = "MIT"
diff --git a/encrypt-config/Cargo.toml b/encrypt-config/Cargo.toml
index 8121d7d..469c3e9 100644
--- a/encrypt-config/Cargo.toml
+++ b/encrypt-config/Cargo.toml
@@ -25,12 +25,12 @@ encrypt_config_derive = { workspace = true, optional = true }
 rustc_version = "0.4.0"
 
 [features]
-default = ["serde", "save_on_change"]
+default = ["serde"]
 full = ["default", "persist", "secret", "derive"]
 serde = ["dep:serde", "dep:serde_json"]
 derive = ["dep:encrypt_config_derive"]
 secret = ["dep:rsa", "dep:rand", "dep:keyring", "persist", "encrypt_config_derive?/secret"]
-persist = ["encrypt_config_derive?/persist"]
+persist = [ "save_on_change", "encrypt_config_derive?/persist"]
 default_config_dir = ["dep:dirs-next", "encrypt_config_derive?/default_config_dir"]
 protobuf = []
 save_on_change = []
diff --git a/encrypt-config/src/config.rs b/encrypt-config/src/config.rs
index ecd84b8..10e5028 100644
--- a/encrypt-config/src/config.rs
+++ b/encrypt-config/src/config.rs
@@ -98,7 +98,6 @@ impl Config {
     /// Add a persist source to the config.
     /// The source must implement [`PersistSource`] trait, which is for config that needs to be persisted.
     #[cfg(feature = "persist")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "persist")))]
     pub fn add_persist_source(&mut self, source: impl PersistSource) -> ConfigResult<()> {
         let map = match std::fs::read(source.path()) {
             Ok(serded) => serde_json::from_slice(&serded)?,
@@ -119,7 +118,6 @@ impl Config {
     /// Add a secret source to the config.
     /// The source must implement [`SecretSource`] trait, which is for config that needs to be encrypted and persisted.
     #[cfg(feature = "secret")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "secret")))]
     pub fn add_secret_source(&mut self, source: impl SecretSource) -> ConfigResult<()> {
         let map = match std::fs::read(source.path()) {
             Ok(encrypted) => serde_json::from_slice(&self.encrypter.decrypt(&encrypted)?)?,
@@ -153,52 +151,47 @@ impl Config {
     }
 
     /// Upgrade a value in the config. The key must already exist.
-    #[cfg(feature = "persist")]
     pub fn upgrade<K, V>(&mut self, key: K, value: &V) -> ConfigResult<()>
     where
         K: AsRef<str>,
         V: serde::Serialize,
     {
-        let (_kind, map) = self
-            .cache
-            .iter_mut()
-            .find(|(_, map)| map.contains_key(key.as_ref()))
-            .context(ConfigNotFound {
+        #[cfg(feature = "persist")]
+        {
+            let (_kind, map) = self
+                .cache
+                .iter_mut()
+                .find(|(_, map)| map.contains_key(key.as_ref()))
+                .context(ConfigNotFound {
+                    key: key.as_ref().to_owned(),
+                })?;
+
+            let v = map.get_mut(key.as_ref()).unwrap();
+            *v = serde_json::to_vec(value)?;
+            #[cfg(feature = "save_on_change")]
+            match _kind {
+                Kind::Normal => {}
+                Kind::Persist(path) => {
+                    let path = path.write().unwrap();
+                    std::fs::write(&*path, serde_json::to_vec(map)?)?;
+                }
+                #[cfg(feature = "secret")]
+                Kind::Secret(path) => {
+                    let path = path.write().unwrap();
+                    std::fs::write(&*path, self.encrypter.encrypt(map)?)?;
+                }
+            }
+        }
+        #[cfg(not(feature = "persist"))]
+        {
+            let v = self.cache.get_mut(key.as_ref()).context(ConfigNotFound {
                 key: key.as_ref().to_owned(),
             })?;
-
-        let v = map.get_mut(key.as_ref()).unwrap();
-        *v = serde_json::to_vec(value)?;
-        #[cfg(feature = "save_on_change")]
-        match _kind {
-            Kind::Normal => {}
-            Kind::Persist(path) => {
-                let path = path.write().unwrap();
-                std::fs::write(&*path, serde_json::to_vec(map)?)?;
-            }
-            #[cfg(feature = "secret")]
-            Kind::Secret(path) => {
-                let path = path.write().unwrap();
-                std::fs::write(&*path, self.encrypter.encrypt(map)?)?;
-            }
+            *v = serde_json::to_vec(value)?;
         }
         Ok(())
     }
 
-    /// Upgrade a value in the config. The key must already exist.
-    #[cfg(not(feature = "persist"))]
-    pub fn upgrade<K, V>(&mut self, key: K, value: V) -> ConfigResult<()>
-    where
-        K: AsRef<str>,
-        V: serde::Serialize,
-    {
-        let v = self.cache.get_mut(key.as_ref()).context(ConfigNotFound {
-            key: key.as_ref().to_owned(),
-        })?;
-        *v = serde_json::to_vec(&value)?;
-        Ok(())
-    }
-
     #[allow(unused)]
     #[cfg(not(feature = "save_on_change"))]
     #[cfg_attr(doc_cfg, doc(cfg(feature = "save_on_change")))]
diff --git a/encrypt-config/src/lib.rs b/encrypt-config/src/lib.rs
index e8084f6..68f1580 100644
--- a/encrypt-config/src/lib.rs
+++ b/encrypt-config/src/lib.rs
@@ -4,6 +4,8 @@
 
 #[cfg(all(not(feature = "persist"), feature = "default_config_dir"))]
 compile_error!("Feature `default_config_dir` only works with feature `persist` on.");
+#[cfg(all(not(feature = "persist"), feature = "save_on_change"))]
+compile_error!("Feature `save_on_change` is designed only for feature `persist` on.");
 #[cfg(all(not(feature = "secret"), feature = "mock"))]
 compile_error!("Feature `mock` is designed only for feature `secret` on.");