diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9038bc37..7cdb311f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,11 @@
+# Version 0.4.1 (2020-10-11)
+
+* Add missing `extern crate proc_macro;` [(#22)](https://github.com/paritytech/scale-info/pull/24)
+
 # 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)
+* 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)
 
diff --git a/Cargo.toml b/Cargo.toml
index a529409e..11e89814 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "scale-info"
-version = "0.4.0"
+version = "0.4.1"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2018"
 
@@ -14,7 +14,7 @@ categories = ["no-std", "encoding"]
 include = ["Cargo.toml", "src/**/*.rs", "README.md", "LICENSE"]
 
 [dependencies]
-scale-info-derive = { version = "0.2.0", path = "derive", default-features = false, optional = true }
+scale-info-derive = { version = "0.2.1", path = "derive", default-features = false, optional = true }
 serde = { version = "1", default-features = false, features = ["derive", "alloc"] }
 derive_more = { version = "0.99.1", default-features = false, features = ["from"] }
 scale = { package = "parity-scale-codec", version = "1.3", default-features = false, features = ["derive"] }
diff --git a/derive/Cargo.toml b/derive/Cargo.toml
index 6d13c46c..f14da8d9 100644
--- a/derive/Cargo.toml
+++ b/derive/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "scale-info-derive"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["Parity Technologies <admin@parity.io>", "Centrality Developers <support@centrality.ai>"]
 edition = "2018"
 
diff --git a/derive/src/lib.rs b/derive/src/lib.rs
index 0e9bd874..e3a7875e 100644
--- a/derive/src/lib.rs
+++ b/derive/src/lib.rs
@@ -15,6 +15,7 @@
 #![cfg_attr(not(feature = "std"), no_std)]
 
 extern crate alloc;
+extern crate proc_macro;
 
 mod impl_wrapper;