diff --git a/primitives/Cargo.toml b/primitives/Cargo.toml
index 45ca668..47b7543 100644
--- a/primitives/Cargo.toml
+++ b/primitives/Cargo.toml
@@ -12,7 +12,6 @@ std = [
   "fixed-hash/std",
   "hex/std",
   "serde",
-
   "impl-serde",
   "impl-codec/std",
   "primitive-types/std",
@@ -22,7 +21,7 @@ std = [
 [dependencies]
 byteorder = { version = "1.3", default-features = false }
 fixed-hash = { version = "0.7", default-features = false }
-hex = { version = "0.4", default-features = false }
+hex = { version = "0.4", default-features = false, features = ["alloc"] }
 serde = { version = "1.0", features = ["derive"], optional = true }
 
 impl-serde = { version = "0.3", optional = true }
diff --git a/primitives/src/bytes.rs b/primitives/src/bytes.rs
index bf7bb84..d6a424b 100644
--- a/primitives/src/bytes.rs
+++ b/primitives/src/bytes.rs
@@ -134,7 +134,7 @@ impl<'de> serde::de::Visitor<'de> for BytesVisitor {
     {
         if v.len() >= 2 {
             Ok(Bytes(
-                hex::decode(&v[..]).map_err(|_| serde::de::Error::custom("invalid hex"))?,
+                hex::decode(v).map_err(|_| serde::de::Error::custom("invalid hex"))?,
             ))
         } else {
             Err(serde::de::Error::custom("invalid format"))
diff --git a/serialization/src/impls.rs b/serialization/src/impls.rs
index 33b2311..561b2d5 100644
--- a/serialization/src/impls.rs
+++ b/serialization/src/impls.rs
@@ -120,7 +120,7 @@ impl Deserializable for i32 {
     where
         T: io::Read,
     {
-        Ok(reader.read_i32::<LittleEndian>()?)
+        reader.read_i32::<LittleEndian>()
     }
 }
 
@@ -130,7 +130,7 @@ impl Deserializable for i64 {
     where
         T: io::Read,
     {
-        Ok(reader.read_i64::<LittleEndian>()?)
+        reader.read_i64::<LittleEndian>()
     }
 }
 
@@ -140,7 +140,7 @@ impl Deserializable for u8 {
     where
         T: io::Read,
     {
-        Ok(reader.read_u8()?)
+        reader.read_u8()
     }
 }
 
@@ -150,7 +150,7 @@ impl Deserializable for u16 {
     where
         T: io::Read,
     {
-        Ok(reader.read_u16::<LittleEndian>()?)
+        reader.read_u16::<LittleEndian>()
     }
 }
 
@@ -160,7 +160,7 @@ impl Deserializable for u32 {
     where
         T: io::Read,
     {
-        Ok(reader.read_u32::<LittleEndian>()?)
+        reader.read_u32::<LittleEndian>()
     }
 }
 
@@ -170,7 +170,7 @@ impl Deserializable for u64 {
     where
         T: io::Read,
     {
-        Ok(reader.read_u64::<LittleEndian>()?)
+        reader.read_u64::<LittleEndian>()
     }
 }