diff --git a/CHANGELOG.md b/CHANGELOG.md
index 37d2116..d7b510f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,6 +29,17 @@ Released YYYY-MM-DD.
 
 --------------------------------------------------------------------------------
 
+## 3.12.1
+
+Released 2023-04-21.
+
+### Fixed
+
+* Fixed a bug where `Bump::try_with_capacity(n)` where `n > isize::MAX` could
+  lead to attempts to create invalid `Layout`s.
+
+--------------------------------------------------------------------------------
+
 ## 3.12.0
 
 Released 2023-01-17.
diff --git a/Cargo.toml b/Cargo.toml
index c47627a..68bfbfd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ license = "MIT/Apache-2.0"
 name = "bumpalo"
 readme = "README.md"
 repository = "https://github.com/fitzgen/bumpalo"
-version = "3.12.0"
+version = "3.12.1"
 exclude = ["/.github/*", "/benches", "/tests", "valgrind.supp", "bumpalo.png"]
 
 [package.metadata.docs.rs]