diff --git a/primitive-types/impls/serde/CHANGELOG.md b/primitive-types/impls/serde/CHANGELOG.md
index 43c06ddf5..0757363ea 100644
--- a/primitive-types/impls/serde/CHANGELOG.md
+++ b/primitive-types/impls/serde/CHANGELOG.md
@@ -4,8 +4,9 @@ The format is based on [Keep a Changelog].
 
 [Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
 
-## [0.4.0] - 2022-08-31
+## [0.4.0] - 2022-09-02
 - Support deserializing H256 et al from bytes or sequences of bytes, too. [#668](https://github.com/paritytech/parity-common/pull/668)
+- Support deserializing H256 et al from newtype structs containing anything compatible, too. [#672](https://github.com/paritytech/parity-common/pull/672)
 - Migrated to 2021 edition, enforcing MSRV of `1.56.1`. [#601](https://github.com/paritytech/parity-common/pull/601)
 
 ## [0.3.2] - 2021-11-10
diff --git a/primitive-types/impls/serde/src/serialize.rs b/primitive-types/impls/serde/src/serialize.rs
index 1426d3ddf..3017170e6 100644
--- a/primitive-types/impls/serde/src/serialize.rs
+++ b/primitive-types/impls/serde/src/serialize.rs
@@ -231,6 +231,10 @@ where
 			}
 			Ok(bytes)
 		}
+
+		fn visit_newtype_struct<D: Deserializer<'b>>(self, deserializer: D) -> Result<Self::Value, D::Error> {
+			deserializer.deserialize_bytes(self)
+		}
 	}
 
 	deserializer.deserialize_str(Visitor)
@@ -309,6 +313,10 @@ where
 			}
 			self.visit_byte_buf(v)
 		}
+
+		fn visit_newtype_struct<D: Deserializer<'b>>(self, deserializer: D) -> Result<Self::Value, D::Error> {
+			deserializer.deserialize_bytes(self)
+		}
 	}
 
 	deserializer.deserialize_str(Visitor { len })