diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0728e22b4..9e9b685ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+## v1.13.0 (2023-12-20)
+
 * limit supported python versions to `">=3.9"` in accordance with numpy
 
 * Change from `nosetest` to `pytest`
diff --git a/GPy/__version__.py b/GPy/__version__.py
index b518f6eed..9a34ccc9f 100644
--- a/GPy/__version__.py
+++ b/GPy/__version__.py
@@ -1 +1 @@
-__version__ = "1.12.0"
+__version__ = "1.13.0"
diff --git a/setup.cfg b/setup.cfg
index 489715d1c..b42e96d30 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 1.12.0
+current_version = 1.13.0
 tag = True
 commit = True