diff --git a/_metadata.py b/_metadata.py
index 323ac76..567207f 100644
--- a/_metadata.py
+++ b/_metadata.py
@@ -1,2 +1,2 @@
-__extension_version__ = "0.7.0"
+__extension_version__ = "0.8.0"
 __extension_name__ = "pytket-iqm"
diff --git a/docs/changelog.rst b/docs/changelog.rst
index df68019..d3e9177 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -1,11 +1,12 @@
 Changelog
 ~~~~~~~~~
 
-Unreleased
-----------
+0.8.0 (October 2023)
+--------------------
 
 * Don't include ``SimplifyInitial`` in default passes; instead make it an option
   to ``process_circuits()``.
+* Updated pytket version requirement to 1.21.
 
 0.7.0 (October 2023)
 --------------------
diff --git a/setup.py b/setup.py
index 4ce20d9..a4af4aa 100644
--- a/setup.py
+++ b/setup.py
@@ -42,7 +42,7 @@
     license="Apache 2",
     packages=find_namespace_packages(include=["pytket.*"]),
     include_package_data=True,
-    install_requires=["pytket ~= 1.20", "iqm-client ~= 14.0"],
+    install_requires=["pytket ~= 1.21", "iqm-client ~= 14.0"],
     classifiers=[
         "Environment :: Console",
         "Programming Language :: Python :: 3.9",