diff --git a/_metadata.py b/_metadata.py
index 5f7ffeb..1d358fd 100644
--- a/_metadata.py
+++ b/_metadata.py
@@ -1,2 +1,2 @@
-__extension_version__ = "0.26.0"
+__extension_version__ = "0.27.0"
 __extension_name__ = "pytket-aqt"
diff --git a/docs/changelog.rst b/docs/changelog.rst
index f5fad0f..0d11945 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -1,6 +1,11 @@
 Changelog
 ~~~~~~~~~
 
+0.27.0 (May 2023)
+-----------------
+
+* Updated pytket version requirement to 1.15.
+
 0.26.0 (April 2023)
 -------------------
 
diff --git a/setup.py b/setup.py
index 86a3c0f..815bff1 100644
--- a/setup.py
+++ b/setup.py
@@ -42,7 +42,7 @@
     packages=find_namespace_packages(include=["pytket.*"]),
     include_package_data=True,
     install_requires=[
-        "pytket ~= 1.14",
+        "pytket ~= 1.15",
         "requests ~= 2.22",
         "types-requests",
         "pydantic ~= 1.10",