diff --git a/changelog.d/update-policyengine-uk-2.88.3.changed.md b/changelog.d/update-policyengine-uk-2.88.3.changed.md
new file mode 100644
index 000000000..a702bc00e
--- /dev/null
+++ b/changelog.d/update-policyengine-uk-2.88.3.changed.md
@@ -0,0 +1 @@
+Update PolicyEngine UK to 2.88.3.
diff --git a/pyproject.toml b/pyproject.toml
index 27f43a526..852ab2fc7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ dependencies = [
     "policyengine_canada==0.96.3",
     "policyengine-ng==0.5.1",
     "policyengine-il==0.1.0",
-    "policyengine_uk==2.78.0",
+    "policyengine_uk==2.88.3",
     "policyengine_us==1.634.9",
     "policyengine_core>=3.16.6",
     "policyengine>0.12.0,<1",