diff --git a/Cargo.toml b/Cargo.toml
index 7b01de5..5a15f5f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ categories = ["algorithms", "science", "no-std"]
 license = "MIT/Apache-2.0"
 repository = "https://github.com/rust-num/num-traits"
 name = "num-traits"
-version = "0.2.3"
+version = "0.2.4"
 readme = "README.md"
 build = "build.rs"
 
diff --git a/RELEASES.md b/RELEASES.md
index cdec035..cbf64da 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -1,3 +1,13 @@
+# Release 0.2.4
+
+- [Support for 128-bit integers is now automatically detected and enabled.][69]
+  Setting the `i128` crate feature now causes the build script to panic if such
+  support is not detected.
+
+**Contributors**: @cuviper
+
+[69]: https://github.com/rust-num/num-traits/pull/69
+
 # Release 0.2.3
 
 - [The new `CheckedNeg` and `CheckedRem` traits][63] perform checked `Neg` and