diff --git a/_metadata.py b/_metadata.py
index a8b24168..84191e26 100644
--- a/_metadata.py
+++ b/_metadata.py
@@ -1,2 +1,2 @@
-__extension_version__ = "0.55.0"
+__extension_version__ = "0.56.0"
 __extension_name__ = "pytket-qiskit"
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 443ac46d..7b4a101f 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -4,8 +4,8 @@ Changelog
 .. currentmodule:: pytket.extensions.qiskit
 
 
-Unreleased
-----------
+0.56.0 (September 2024)
+-----------------------
 
 * Added :py:class:`AerDensityMatrixBackend` simulator. This simulator has the option to support a :py:class:`NoiseModel`.
 * Fix conversion of symbols into qiskit.