diff --git a/changelog.d/policyengine-uk-2.88.0.changed.md b/changelog.d/policyengine-uk-2.88.0.changed.md
new file mode 100644
index 0000000..8611c8d
--- /dev/null
+++ b/changelog.d/policyengine-uk-2.88.0.changed.md
@@ -0,0 +1 @@
+Update policyengine-uk to 2.88.0.
diff --git a/pyproject.toml b/pyproject.toml
index 37b88d4..1c957d7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ dependencies = [
     "supabase>=2.10.0",
     "storage3>=0.8.1",
     "policyengine>=3.2.3",
-    "policyengine-uk==2.75.1",
+    "policyengine-uk==2.88.0",
     "policyengine-us==1.633.2",
     "pydantic>=2.9.2",
     "pydantic-settings>=2.6.0",
diff --git a/uv.lock b/uv.lock
index 022384e..d14295c 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1856,7 +1856,7 @@ wheels = [
 
 [[package]]
 name = "policyengine-api-v2"
-version = "0.6.3"
+version = "0.6.4"
 source = { editable = "." }
 dependencies = [
     { name = "alembic" },
@@ -1910,7 +1910,7 @@ requires-dist = [
     { name = "logfire", extras = ["fastapi", "httpx", "sqlalchemy"], specifier = ">=0.60.0" },
     { name = "modal", specifier = ">=0.68.0" },
     { name = "policyengine", specifier = ">=3.2.3" },
-    { name = "policyengine-uk", specifier = "==2.75.1" },
+    { name = "policyengine-uk", specifier = "==2.88.0" },
     { name = "policyengine-us", specifier = "==1.633.2" },
     { name = "psycopg2-binary", specifier = ">=2.9.10" },
     { name = "pydantic", specifier = ">=2.9.2" },
@@ -1961,7 +1961,7 @@ wheels = [
 
 [[package]]
 name = "policyengine-uk"
-version = "2.75.1"
+version = "2.88.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "microdf-python" },
@@ -1969,9 +1969,9 @@ dependencies = [
     { name = "pydantic" },
     { name = "tables" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/15/02/56d6a79e120c882c8aa292fd82f3d90225d938630eb9427dff40bcc416b1/policyengine_uk-2.75.1.tar.gz", hash = "sha256:34478b267bf5c3110a9202535b757fb9c53d3813a86546b31e7b7c33cf9283c9", size = 1102676, upload-time = "2026-03-10T10:54:32.338Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/72/cf/749dea25c17210b5dc40098363e0b6a60b7fc5feb69ff77c74b88deb5cde/policyengine_uk-2.88.0.tar.gz", hash = "sha256:d157c7336b7aa3a321f317af1a4f111d7b857451ff43f4998abdc5a8c893e989", size = 1166666, upload-time = "2026-04-17T19:22:55.418Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/52/28/cb9eff0ad163563a5dcb9667addb3e4a7929696a45b34b90d46a41f0d622/policyengine_uk-2.75.1-py3-none-any.whl", hash = "sha256:77d2552be3e2df1bbcb95a463a99aee22f9c4f8976c58a1d3cde2831c4454d3a", size = 1697838, upload-time = "2026-03-10T10:54:30.57Z" },
+    { url = "https://files.pythonhosted.org/packages/23/7e/8a2a42eac1da63730a865964aa17e7fd4420ce4db4c80001c1b5ca6011e8/policyengine_uk-2.88.0-py3-none-any.whl", hash = "sha256:46a3ba443b43ec810c5efaccd4645edb63c8dc90ef5acf9b0cdf5ace86b9334d", size = 1867764, upload-time = "2026-04-17T19:22:53.244Z" },
 ]
 
 [[package]]