diff --git a/changelog.d/policyengine-uk-2.88.18.changed.md b/changelog.d/policyengine-uk-2.88.18.changed.md
new file mode 100644
index 0000000..65480da
--- /dev/null
+++ b/changelog.d/policyengine-uk-2.88.18.changed.md
@@ -0,0 +1 @@
+Update policyengine-uk to 2.88.18.
diff --git a/pyproject.toml b/pyproject.toml
index 8979458..b01ba70 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ dependencies = [
     "supabase>=2.10.0",
     "storage3>=0.8.1",
     "policyengine==4.4.4",
-    "policyengine-uk==2.88.14",
+    "policyengine-uk==2.88.18",
     "policyengine-us==1.691.3",
     "pydantic>=2.9.2",
     "pydantic-settings>=2.6.0",
diff --git a/uv.lock b/uv.lock
index 2f0d796..cf5d104 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1918,7 +1918,7 @@ wheels = [
 
 [[package]]
 name = "policyengine-api-v2"
-version = "0.6.6"
+version = "0.6.10"
 source = { editable = "." }
 dependencies = [
     { name = "alembic" },
@@ -1972,7 +1972,7 @@ requires-dist = [
     { name = "logfire", extras = ["fastapi", "httpx", "sqlalchemy"], specifier = ">=0.60.0" },
     { name = "modal", specifier = ">=0.68.0" },
     { name = "policyengine", specifier = "==4.4.4" },
-    { name = "policyengine-uk", specifier = "==2.88.14" },
+    { name = "policyengine-uk", specifier = "==2.88.18" },
     { name = "policyengine-us", specifier = "==1.691.3" },
     { name = "psycopg2-binary", specifier = ">=2.9.10" },
     { name = "pydantic", specifier = ">=2.9.2" },
@@ -2023,7 +2023,7 @@ wheels = [
 
 [[package]]
 name = "policyengine-uk"
-version = "2.88.14"
+version = "2.88.18"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "microdf-python" },
@@ -2031,9 +2031,9 @@ dependencies = [
     { name = "pydantic" },
     { name = "tables" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/8c/2b/ab82aa30c5d27176fd9d449ff5ed9708d0080b00912f7dc2efa0af0fd87e/policyengine_uk-2.88.14.tar.gz", hash = "sha256:21a4387ae52dcb5430b6d790edcc321816ed47147a3a0e21ffd482a36834d352", size = 1185947, upload-time = "2026-05-09T04:19:25.284Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/ca/0b/f651ab70a52f68fce3e9e3acf3d82cc98b5a29c9adc2f5640f4431cc5ae9/policyengine_uk-2.88.18.tar.gz", hash = "sha256:35b2dac76a9450d747e6f45981ad4c7ffa43c9e9f205b1ce2bfd25cc5e1920e5", size = 1187371, upload-time = "2026-05-17T14:18:22.624Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/a3/fc/276fb639a46bda35523329d8968bcc4089fde9e97fab82722c0ec853c6cc/policyengine_uk-2.88.14-py3-none-any.whl", hash = "sha256:ed10005ba7d0c973c0966ebbf7672853fb3caaa0456b8bf485fb13f8c323d975", size = 1913671, upload-time = "2026-05-09T04:19:23.364Z" },
+    { url = "https://files.pythonhosted.org/packages/fe/94/96ae35fc97cfbb1a160f737afac6d85ff04b76588b138ffc883411d1dc57/policyengine_uk-2.88.18-py3-none-any.whl", hash = "sha256:ab086392cdcd27a10601ec2bbfead4abf6ea64682a046b2c7231bb465a504a34", size = 1915114, upload-time = "2026-05-17T14:18:21.091Z" },
 ]
 
 [[package]]