diff --git a/CHANGELOG.md b/CHANGELOG.md
index d9cf484..9c73473 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+### 0.4.2
+
+Released 2018/07/16.
+
+* Updated again for changes to Rust's standard allocator API.
+
 ### 0.4.1
 
 Released 2018/06/15.
diff --git a/wee_alloc/Cargo.toml b/wee_alloc/Cargo.toml
index 60e965f..f9a1528 100644
--- a/wee_alloc/Cargo.toml
+++ b/wee_alloc/Cargo.toml
@@ -11,7 +11,7 @@ license = "MPL-2.0"
 name = "wee_alloc"
 readme = "../README.md"
 repository = "https://github.com/rustwasm/wee_alloc"
-version = "0.4.1"
+version = "0.4.2"
 
 [badges]
 travis-ci = { repository = "rustwasm/wee_alloc" }