diff --git a/mla/Cargo.toml b/mla/Cargo.toml
index b2097db..86a6087 100644
--- a/mla/Cargo.toml
+++ b/mla/Cargo.toml
@@ -15,7 +15,7 @@ readme = "../README.md"
 rand = { version = "0.8", default-features = false, features = ["getrandom", "std"]}
 rand_chacha = { version = "0.3", default-features = false}
 brotli = { version = "3.3", default-features = false, features = ["std"]}
-bitflags = { version = "1.2", default-features = false}
+bitflags = { version = "2.1", default-features = false, features = ["serde"]}
 byteorder = { version = "1.3", default-features = false, features = ["std"] }
 serde = { version = "1", default-features = false, features = ["derive"] }
 bincode = { version = "1.3", default-features = false}
diff --git a/mla/src/lib.rs b/mla/src/lib.rs
index b4d8873..748e743 100644
--- a/mla/src/lib.rs
+++ b/mla/src/lib.rs
@@ -54,12 +54,12 @@ bitflags! {
     /// [Encryption (ENCRYPT)]
     /// [Raw File I/O]
     /// ```
-    #[derive(Serialize, Deserialize)]
+    #[derive(Debug, Clone, Copy, PartialEq, Serialize, Deserialize)]
     pub struct Layers: u8 {
         const ENCRYPT = 0b0000_0001;
         const COMPRESS = 0b0000_0010;
         /// Recommended layering
-        const DEFAULT = Self::ENCRYPT.bits | Self::COMPRESS.bits;
+        const DEFAULT = Self::ENCRYPT.bits() | Self::COMPRESS.bits();
         /// No additional layer (ie, for debugging purpose)
         const DEBUG = 0;
         const EMPTY = 0;