diff --git a/CHANGES.md b/CHANGES.md
index 6061a5f..e4c3bba 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,6 @@
 # CHANGES
 
-## Unreleased
+## 2.4.0 (2026-10-11)
 
 - Support Python 3.15, including the free-threaded CPython 3.15 build, with
   tests and wheels for Linux, macOS, and Windows
diff --git a/src/cchardet/__init__.py b/src/cchardet/__init__.py
index 5d20be6..852bd5a 100644
--- a/src/cchardet/__init__.py
+++ b/src/cchardet/__init__.py
@@ -17,8 +17,8 @@ class ResultDict(TypedDict):
     language: str | None
 
 
-version: tuple[int, int, int] = (2, 3, 0)
-__version__ = "2.3.0"
+version: tuple[int, int, int] = (2, 4, 0)
+__version__ = "2.4.0"
 
 
 def _as_bytes(data: BytesLike) -> bytes: