diff --git a/docs/changelog.rst b/docs/changelog.rst
index b94aba7..b2e811a 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -2,6 +2,14 @@ Changelog
 =========
 
 
+Version 1.4.0
+-------------
+
+Released on 2024-10-24
+
+* Support CSS Color Level 4
+
+
 Version 1.3.0
 -------------
 
diff --git a/tinycss2/__init__.py b/tinycss2/__init__.py
index 57afc4b..dabb74c 100644
--- a/tinycss2/__init__.py
+++ b/tinycss2/__init__.py
@@ -15,4 +15,4 @@
 from .serializer import serialize, serialize_identifier  # noqa
 from .tokenizer import parse_component_value_list  # noqa
 
-VERSION = __version__ = '1.3.0'
+VERSION = __version__ = '1.4.0'