diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2cd88a54..9038bc37 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+# Version 0.4.0 (2020-10-05)
+
+* Add public getters for fields in meta type hierarchy [(#22)](https://github.com/paritytech
+/scale-info/pull/22)
+* Implement SCALE encoding and serde deserialization [(#19)](https://github.com/paritytech/scale
+-info/pull/19)
+
 # Version 0.3.0 (2020-07-03)
 
 * Remove string table, inline strings [(#17)](https://github.com/paritytech/scale-info/pull/17)
diff --git a/Cargo.toml b/Cargo.toml
index 749b0f0a..a529409e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "scale-info"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2018"
 
diff --git a/src/interner.rs b/src/interner.rs
index 782f5352..b1af0dc3 100644
--- a/src/interner.rs
+++ b/src/interner.rs
@@ -32,7 +32,7 @@ use serde::{Deserialize, Serialize};
 #[serde(transparent)]
 pub struct UntrackedSymbol<T> {
 	/// The index to the symbol in the interner table.
-	pub id: NonZeroU32,
+	id: NonZeroU32,
 	#[serde(skip)]
 	marker: PhantomData<fn() -> T>,
 }
@@ -57,6 +57,13 @@ impl<T> scale::Decode for UntrackedSymbol<T> {
 	}
 }
 
+impl<T> UntrackedSymbol<T> {
+	/// Returns the index to the symbol in the interner table.
+	pub fn id(&self) -> NonZeroU32 {
+		self.id
+	}
+}
+
 /// A symbol from an interner.
 ///
 /// Can be used to resolve to the associated instance.