diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2a0aa1b..3f9e366 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,18 @@ Released YYYY-MM-DD.
 
 --------------------------------------------------------------------------------
 
+## 3.15.4
+
+Released 2024-03-07.
+
+### Added
+
+* Added the `bumpalo::collections::Vec::extend_from_slices_copy` method, which
+  is a faster way to extend a vec from multiple slices when the element is
+  `Copy` than calling `extend_from_slice_copy` N times.
+
+--------------------------------------------------------------------------------
+
 ## 3.15.3
 
 Released 2024-02-22.
diff --git a/Cargo.toml b/Cargo.toml
index 97d56d5..115b58e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ license = "MIT OR Apache-2.0"
 name = "bumpalo"
 readme = "README.md"
 repository = "https://github.com/fitzgen/bumpalo"
-version = "3.15.3"
+version = "3.15.4"
 exclude = ["/.github/*", "/benches", "/tests", "valgrind.supp", "bumpalo.png"]
 rust-version = "1.73.0"