diff --git a/src/cloud.rs b/src/cloud.rs
index ce7ef7f..43c3f32 100644
--- a/src/cloud.rs
+++ b/src/cloud.rs
@@ -40,13 +40,13 @@ struct Input {
 }
 
 impl Cloud {
-    pub const APP_ID: &str = "1010";
-    pub const APP_KEY: &str = "ac21b9f9cbfe4ca5a88562ef25e2b768";
-    pub const API_URL: &str = "https://mp-prod.appsmb.com/mas/v5/app/proxy?alias=";
-    pub const APP_VERSION: &str = "3.0.2";
-    pub const SRC: &str = "10";
-    pub const IOT_KEY: &str = "meicloud";
-    pub const HMAC_KEY: &str = "PROD_VnoClJI9aikS8dyy";
+    pub const APP_ID: &'static str = "1010";
+    pub const APP_KEY: &'static str = "ac21b9f9cbfe4ca5a88562ef25e2b768";
+    pub const API_URL: &'static str = "https://mp-prod.appsmb.com/mas/v5/app/proxy?alias=";
+    pub const APP_VERSION: &'static str = "3.0.2";
+    pub const SRC: &'static str = "10";
+    pub const IOT_KEY: &'static str = "meicloud";
+    pub const HMAC_KEY: &'static str = "PROD_VnoClJI9aikS8dyy";
 
     pub fn new(account: impl ToString, password: impl ToString) -> Result<Self> {
         let account = account.to_string();
diff --git a/src/security.rs b/src/security.rs
index 8106cf8..e6dafe4 100644
--- a/src/security.rs
+++ b/src/security.rs
@@ -34,7 +34,7 @@ impl Security {
     const N: u128 = 141661095494369103254425781617665632877;
     const KEY: [u8; 16] = Self::N.to_be_bytes();
     const IV: [u8; 16] = [b'\0'; 16];
-    const SALT: &[u8] = b"xhdiwjnchekd4d512chdjx5d8e4c394D2D7S";
+    const SALT: &'static [u8] = b"xhdiwjnchekd4d512chdjx5d8e4c394D2D7S";
 
     pub fn encode32_data(data: &[u8]) -> Vec<u8> {
         md5::compute([data, Self::SALT].concat()).to_vec()