diff --git a/Cargo.toml b/Cargo.toml
index f2d40de..64eb5f7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,7 +20,7 @@ serde = {version = "1.0.91", features = ["derive"]}
 serde_json = "1.0.39"
 csv = "1.0.7"
 env_logger = "0.6.1"
-snafu = {version="0.3.1", features = ["backtraces", "rust_1_30"]}
+snafu = {version="0.4.1", features = ["backtraces", "rust_1_30"]}
 num-traits = "0.2"
 num-derive = "0.2"
 winstructs = "0.1.1"
diff --git a/src/attribute/raw.rs b/src/attribute/raw.rs
index 1e24969..8285ae5 100644
--- a/src/attribute/raw.rs
+++ b/src/attribute/raw.rs
@@ -29,7 +29,7 @@ impl RawAttribute {
     }
 }
 
-fn data_as_hex<S>(x: &Vec<u8>, s: S) -> std::result::Result<S::Ok, S::Error>
+fn data_as_hex<S>(x: &[u8], s: S) -> std::result::Result<S::Ok, S::Error>
 where
     S: ser::Serializer,
 {