diff --git a/26_kv/src/storage/memory.rs b/26_kv/src/storage/memory.rs
index f3cc3ef..7429f3e 100644
--- a/26_kv/src/storage/memory.rs
+++ b/26_kv/src/storage/memory.rs
@@ -31,9 +31,14 @@ impl Storage for MemTable {
         Ok(table.get(key).map(|v| v.value().clone()))
     }
 
-    fn set(&self, table: &str, key: String, value: Value) -> Result<Option<Value>, KvError> {
+    fn set(
+        &self,
+        table: &str,
+        key: impl Into<String>,
+        value: impl Into<Value>,
+    ) -> Result<Option<Value>, KvError> {
         let table = self.get_or_create_table(table);
-        Ok(table.insert(key, value))
+        Ok(table.insert(key.into(), value.into()))
     }
 
     fn contains(&self, table: &str, key: &str) -> Result<bool, KvError> {
diff --git a/26_kv/src/storage/mod.rs b/26_kv/src/storage/mod.rs
index 63261f2..6ad910c 100644
--- a/26_kv/src/storage/mod.rs
+++ b/26_kv/src/storage/mod.rs
@@ -11,7 +11,12 @@ pub trait Storage {
     /// 从一个 HashTable 里获取一个 key 的 value
     fn get(&self, table: &str, key: &str) -> Result<Option<Value>, KvError>;
     /// 从一个 HashTable 里设置一个 key 的 value，返回旧的 value
-    fn set(&self, table: &str, key: String, value: Value) -> Result<Option<Value>, KvError>;
+    fn set(
+        &self,
+        table: &str,
+        key: impl Into<String>,
+        value: impl Into<Value>,
+    ) -> Result<Option<Value>, KvError>;
     /// 查看 HashTable 中是否有 key
     fn contains(&self, table: &str, key: &str) -> Result<bool, KvError>;
     /// 从 HashTable 中删除一个 key
@@ -94,10 +99,10 @@ mod tests {
 
     fn test_basi_interface(store: impl Storage) {
         // 第一次 set 会创建 table，插入 key 并返回 None（之前没值）
-        let v = store.set("t1", "hello".into(), "world".into());
+        let v = store.set("t1", "hello", "world");
         assert!(v.unwrap().is_none());
         // 再次 set 同样的 key 会更新，并返回之前的值
-        let v1 = store.set("t1", "hello".into(), "world1".into());
+        let v1 = store.set("t1", "hello", "world1");
         assert_eq!(v1, Ok(Some("world".into())));
 
         // get 存在的 key 会得到最新的值
@@ -123,8 +128,8 @@ mod tests {
     }
 
     fn test_get_all(store: impl Storage) {
-        store.set("t2", "k1".into(), "v1".into()).unwrap();
-        store.set("t2", "k2".into(), "v2".into()).unwrap();
+        store.set("t2", "k1", "v1").unwrap();
+        store.set("t2", "k2", "v2").unwrap();
         let mut data = store.get_all("t2").unwrap();
         data.sort_by(|a, b| a.partial_cmp(b).unwrap());
         assert_eq!(
@@ -137,8 +142,8 @@ mod tests {
     }
 
     fn test_get_iter(store: impl Storage) {
-        store.set("t2", "k1".into(), "v1".into()).unwrap();
-        store.set("t2", "k2".into(), "v2".into()).unwrap();
+        store.set("t2", "k1", "v1").unwrap();
+        store.set("t2", "k2", "v2").unwrap();
         let mut data: Vec<_> = store.get_iter("t2").unwrap().collect();
         data.sort_by(|a, b| a.partial_cmp(b).unwrap());
         assert_eq!(
diff --git a/26_kv/src/storage/sleddb.rs b/26_kv/src/storage/sleddb.rs
index c321e73..df8756c 100644
--- a/26_kv/src/storage/sleddb.rs
+++ b/26_kv/src/storage/sleddb.rs
@@ -36,9 +36,15 @@ impl Storage for SledDb {
         flip(result)
     }
 
-    fn set(&self, table: &str, key: String, value: Value) -> Result<Option<Value>, KvError> {
+    fn set(
+        &self,
+        table: &str,
+        key: impl Into<String>,
+        value: impl Into<Value>,
+    ) -> Result<Option<Value>, KvError> {
+        let key = key.into();
         let name = SledDb::get_full_key(table, &key);
-        let data: Vec<u8> = value.try_into()?;
+        let data: Vec<u8> = value.into().try_into()?;
 
         let result = self.0.insert(name, data)?.map(|v| v.as_ref().try_into());
         flip(result)
diff --git a/31_ffi/bzlib_sys/src/bindings.rs b/31_ffi/bzlib_sys/src/bindings.rs
index 95e6c27..6114a05 100644
--- a/31_ffi/bzlib_sys/src/bindings.rs
+++ b/31_ffi/bzlib_sys/src/bindings.rs
@@ -1,5 +1,3 @@
-#![allow(unknown_lints)]
-#![allow(clippy::all)]
 /* automatically generated by rust-bindgen 0.59.1 */
 
 pub const BZ_RUN: u32 = 0;
diff --git a/31_ffi/bzlib_sys/src/lib.rs b/31_ffi/bzlib_sys/src/lib.rs
index f68e716..96d5063 100644
--- a/31_ffi/bzlib_sys/src/lib.rs
+++ b/31_ffi/bzlib_sys/src/lib.rs
@@ -7,6 +7,7 @@
 use anyhow::{anyhow, Result};
 use std::mem;
 
+#[allow(clippy::all)]
 mod bindings;
 
 pub use bindings::*;