diff --git a/.github/bump_version.py b/.github/bump_version.py
new file mode 100644
index 00000000..bb0fd6dd
--- /dev/null
+++ b/.github/bump_version.py
@@ -0,0 +1,79 @@
+"""Infer semver bump from towncrier fragment types and update version."""
+
+import re
+import sys
+from pathlib import Path
+
+
+def get_current_version(pyproject_path: Path) -> str:
+    text = pyproject_path.read_text()
+    match = re.search(r'^version\s*=\s*"(\d+\.\d+\.\d+)"', text, re.MULTILINE)
+    if not match:
+        print(
+            "Could not find version in pyproject.toml",
+            file=sys.stderr,
+        )
+        sys.exit(1)
+    return match.group(1)
+
+
+def infer_bump(changelog_dir: Path) -> str:
+    fragments = [
+        f
+        for f in changelog_dir.iterdir()
+        if f.is_file() and f.name != ".gitkeep"
+    ]
+    if not fragments:
+        print("No changelog fragments found", file=sys.stderr)
+        sys.exit(1)
+
+    categories = {f.suffix.lstrip(".") for f in fragments}
+    for f in fragments:
+        parts = f.stem.split(".")
+        if len(parts) >= 2:
+            categories.add(parts[-1])
+
+    if "breaking" in categories:
+        return "major"
+    if "added" in categories or "removed" in categories:
+        return "minor"
+    return "patch"
+
+
+def bump_version(version: str, bump: str) -> str:
+    major, minor, patch = (int(x) for x in version.split("."))
+    if bump == "major":
+        return f"{major + 1}.0.0"
+    elif bump == "minor":
+        return f"{major}.{minor + 1}.0"
+    else:
+        return f"{major}.{minor}.{patch + 1}"
+
+
+def update_file(path: Path, old_version: str, new_version: str):
+    text = path.read_text()
+    updated = text.replace(
+        f'version = "{old_version}"',
+        f'version = "{new_version}"',
+    )
+    if updated != text:
+        path.write_text(updated)
+        print(f"  Updated {path}")
+
+
+def main():
+    root = Path(__file__).resolve().parent.parent
+    pyproject = root / "pyproject.toml"
+    changelog_dir = root / "changelog.d"
+
+    current = get_current_version(pyproject)
+    bump = infer_bump(changelog_dir)
+    new = bump_version(current, bump)
+
+    print(f"Version: {current} -> {new} ({bump})")
+
+    update_file(pyproject, current, new)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index f49f4ffd..77eb1dbf 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -18,25 +18,20 @@ jobs:
         with:
           options: ". -l 79 --check"
           version: "24.3.0"
-  check-version:
-    name: Check version
+  check-changelog:
+    name: Check changelog fragment
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-          repository: ${{ github.event.pull_request.head.repo.full_name }}
-          ref: ${{ github.event.pull_request.head.ref }}
-      - name: Set up Python
-        uses: actions/setup-python@v4
-        with:
-          python-version: "3.12"
-      - name: Build changelog
-        run: pip install yaml-changelog && make changelog
-      - name: Preview changelog update
-        run: ".github/get-changelog-diff.sh"
-      - name: Check version number has been properly updated
-        run: ".github/is-version-number-acceptable.sh"
+      - uses: actions/checkout@v4
+      - name: Check for changelog fragment
+        run: |
+          FRAGMENTS=$(find changelog.d -type f ! -name '.gitkeep' | wc -l)
+          if [ "$FRAGMENTS" -eq 0 ]; then
+            echo "::error::No changelog fragment found in changelog.d/"
+            echo "Add one with: echo 'Description.' > changelog.d/\$(git branch --show-current).<type>.md"
+            echo "Types: added, changed, fixed, removed, breaking"
+            exit 1
+          fi
   test:
     name: Test
     runs-on: ubuntu-latest
diff --git a/Makefile b/Makefile
index 4b1ddd9c..a1b9b4aa 100644
--- a/Makefile
+++ b/Makefile
@@ -29,13 +29,9 @@ deploy: ## Deploy to GCP
 	rm Dockerfile
 	rm .gac.json
 
-changelog: ## Build changelog
-	build-changelog changelog.yaml --output changelog.yaml --update-last-date --start-from 0.1.0 --append-file changelog_entry.yaml
-	build-changelog changelog.yaml --org PolicyEngine --repo policyengine-household-api --output CHANGELOG.md --template .github/changelog_template.md
-	bump-version changelog.yaml setup.py policyengine_household_api/constants.py
-	rm changelog_entry.yaml || true
-	touch changelog_entry.yaml
-
+changelog:
+	python .github/bump_version.py
+	towncrier build --yes --version $$(python -c "import re; print(re.search(r'version = \"(.+?)\"', open('pyproject.toml').read()).group(1))")
 COMPOSE_FILE ?= docker/docker-compose.yml
 COMPOSE_EXTERNAL_FILE ?= docker/docker-compose.external.yml
 DOCKER_IMG ?= policyengine:policyengine-household-api
diff --git a/changelog_entry.yaml b/changelog.d/.gitkeep
similarity index 100%
rename from changelog_entry.yaml
rename to changelog.d/.gitkeep
diff --git a/changelog.d/migrate-to-towncrier.changed.md b/changelog.d/migrate-to-towncrier.changed.md
new file mode 100644
index 00000000..865484ad
--- /dev/null
+++ b/changelog.d/migrate-to-towncrier.changed.md
@@ -0,0 +1 @@
+Migrated from changelog_entry.yaml to towncrier fragments to eliminate merge conflicts.
diff --git a/changelog.yaml b/changelog.yaml
deleted file mode 100644
index 95c33189..00000000
--- a/changelog.yaml
+++ /dev/null
@@ -1,1365 +0,0 @@
-- changes:
-    added:
-    - Initial API.
-  date: 2023-12-14 00:00:00
-  version: 0.1.0
-- bump: patch
-  changes:
-    changed:
-    - Change links to re-enable changelog building
-  date: 2023-12-18 18:04:42
-- bump: patch
-  changes:
-    changed:
-    - Manually added last changelog entries
-  date: 2023-12-18 18:22:16
-- bump: patch
-  changes:
-    added:
-    - Changelog update.
-  date: 2023-12-19 16:47:18
-- bump: patch
-  changes:
-    changed:
-    - Temporarily disabled GCP deployment
-  date: 2023-12-19 21:26:41
-- bump: patch
-  changes:
-    changed:
-    - Removed unused code portions
-  date: 2023-12-20 23:33:36
-- bump: patch
-  changes:
-    changed:
-    - Removed deprecated economy, metadata, and policy folders
-  date: 2023-12-21 02:02:43
-- bump: patch
-  changes:
-    changed:
-    - Removed deprecated tests
-  date: 2023-12-21 02:18:35
-- bump: patch
-  changes:
-    changed:
-    - Re-enabled local testing in GitHub Actions
-  date: 2023-12-21 02:25:10
-- bump: patch
-  changes:
-    changed:
-    - Added tests to ensure API-light in sync with API
-  date: 2023-12-21 04:50:12
-- bump: minor
-  changes:
-    added:
-    - First version deployment ready.
-  date: 2023-12-21 17:17:09
-- bump: patch
-  changes:
-    changed:
-    - Pointed Dockerfile toward correct target
-  date: 2023-12-21 19:29:40
-- bump: patch
-  changes:
-    changed:
-    - Changing text to redeploy
-  date: 2023-12-21 19:33:02
-- bump: patch
-  changes:
-    changed:
-    - Repo address now lowercase
-  date: 2023-12-21 19:37:10
-- bump: patch
-  changes:
-    changed:
-    - Updated Dockerfile address
-  date: 2023-12-21 20:17:34
-- bump: patch
-  changes:
-    adds:
-    - Specify urllib version in setup.py
-  date: 2023-12-21 20:34:42
-- bump: patch
-  changes:
-    changed:
-    - Corrected import for urllib3
-  date: 2023-12-21 20:41:57
-- bump: patch
-  changes:
-    changed:
-    - Changed urllib3 specification to accord with policyengine-core
-  date: 2023-12-21 20:51:01
-- bump: patch
-  changes:
-    removed:
-    - Reference to deleting non-existent db password
-  date: 2023-12-21 21:38:11
-- bump: minor
-  changes:
-    added:
-    - Added authentication via auth0
-  date: 2024-01-03 02:30:44
-- bump: patch
-  changes:
-    changed:
-    - Moved auth protection to main API file
-  date: 2024-01-03 03:14:38
-- bump: patch
-  changes:
-    removed:
-    - Removed the add_yearly_variables function
-    - Removed conditional yearly variable seeding in get_calculate
-  date: 2024-01-03 17:52:46
-- bump: patch
-  changes:
-    added:
-    - Added tests for malformed and missing auth tokens
-  date: 2024-01-03 18:54:18
-- bump: patch
-  changes:
-    changed:
-    - Corrected environment variables to correspond with different auth0 tenant
-  date: 2024-01-06 23:24:52
-- bump: patch
-  changes:
-    changed:
-    - Correct repo name and updated references (except GCP)
-  date: 2024-01-15 21:47:09
-- bump: patch
-  changes:
-    changed:
-    - Fixed GCP app folder name
-  date: 2024-01-15 21:51:07
-- bump: patch
-  changes:
-    changed:
-    - Updated GCP service account name
-  date: 2024-01-22 18:46:37
-- bump: patch
-  changes:
-    changed:
-    - Properly updated GCP service account address
-  date: 2024-01-22 19:16:47
-- bump: patch
-  changes:
-    changed:
-    - Update README and home page to reflect proper name
-  date: 2024-01-22 20:36:31
-- bump: patch
-  changes:
-    changed:
-    - Fix Black version
-  date: 2024-01-25 22:35:48
-- bump: minor
-  changes:
-    added:
-    - User analytics tracking
-  date: 2024-01-25 23:10:35
-- bump: minor
-  changes:
-    added:
-    - Fix environment variables
-  date: 2024-01-25 23:27:28
-- bump: patch
-  changes:
-    changed:
-    - Removed the '@clients' parameter from the client_id portion of the JWT
-  date: 2024-02-02 16:57:55
-- bump: patch
-  changes:
-    changed:
-    - Added calculate_demo endpoint for use on API documentation page
-  date: 2024-02-02 20:47:10
-- bump: patch
-  changes:
-    changed:
-    - Prevented strange version increase for policyengine-ng
-  date: 2024-02-02 21:49:10
-- bump: patch
-  changes:
-    changed:
-    - Upgraded black to v. 24.3.0
-    - Upgraded policyengine-canada to v. 0.95.0
-    - Upgraded policyengine-uk to v. 0.74.1
-    - Upgraded policyengine-us to v. 0.754.0
-  date: 2024-05-13 16:23:57
-- bump: patch
-  changes:
-    changed:
-    - Fixed main branch reference in bump_country_package
-  date: 2024-05-22 20:32:02
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.777.3
-  date: 2024-05-24 14:37:24
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.777.4
-  date: 2024-05-24 15:12:36
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.777.6
-  date: 2024-05-29 14:03:00
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.777.7
-  date: 2024-05-30 14:12:58
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.779.2
-  date: 2024-06-04 21:27:23
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.780.0
-  date: 2024-06-06 18:08:41
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.780.1
-  date: 2024-06-07 13:31:33
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.781.0
-  date: 2024-06-07 16:42:50
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.782.0
-  date: 2024-06-07 21:15:22
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.783.0
-  date: 2024-06-10 13:32:46
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.785.0
-  date: 2024-06-10 19:50:12
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.785.2
-  date: 2024-06-11 14:56:37
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.786.0
-  date: 2024-06-11 15:45:30
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.788.0
-  date: 2024-06-13 16:57:12
-- bump: patch
-  changes:
-    changed:
-    - Updated authlib version
-  date: 2024-06-13 17:21:10
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.789.0
-  date: 2024-06-14 20:37:53
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.790.0
-  date: 2024-06-19 14:16:30
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.792.0
-  date: 2024-06-20 14:49:25
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.794.2
-  date: 2024-06-21 19:36:42
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 0.796.0
-  date: 2024-06-25 15:21:55
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.1.0
-  date: 2024-06-26 18:30:23
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.3.0
-  date: 2024-06-28 00:54:27
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.4.0
-  date: 2024-06-28 17:40:12
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.5.0
-  date: 2024-07-01 20:19:02
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.5.1
-  date: 2024-07-01 21:37:02
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.8.0
-  date: 2024-07-02 16:57:32
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.10.0
-  date: 2024-07-02 18:00:23
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.13.0
-  date: 2024-07-04 22:43:09
-- bump: patch
-  changes:
-    fixed:
-    - Allow GitHub Actions to use earlier version of glibc
-  date: 2024-07-14 22:46:55
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.21.0
-  date: 2024-07-14 22:53:56
-- bump: patch
-  changes:
-    fixed:
-    - Updated policyengine-uk to 0.86.3
-  date: 2024-07-14 23:04:25
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 0.86.6
-  date: 2024-07-17 19:04:36
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.22.1
-  date: 2024-07-18 20:22:20
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.26.1
-  date: 2024-07-22 19:26:11
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.26.2
-  date: 2024-07-22 21:54:20
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.34.0
-  date: 2024-07-26 02:55:35
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 1.1.0
-  date: 2024-07-26 20:49:29
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.34.1
-  date: 2024-07-26 21:02:47
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 1.2.0
-  date: 2024-07-29 22:10:58
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.34.5
-  date: 2024-07-30 19:20:05
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 1.4.0
-  date: 2024-07-30 19:33:38
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.34.7
-  date: 2024-07-30 23:51:58
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.35.0
-  date: 2024-07-31 18:59:37
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.38.0
-  date: 2024-08-01 20:12:26
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.40.0
-  date: 2024-08-02 19:27:31
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.43.1
-  date: 2024-08-06 23:55:38
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.44.0
-  date: 2024-08-08 18:45:10
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 1.5.1
-  date: 2024-08-12 22:51:20
-- bump: patch
-  changes:
-    changed:
-    - Update to Python 3.10
-    - Updated policyengine-us version
-    - Updated policyengine-uk version
-  date: 2024-08-22 04:10:32
-- bump: patch
-  changes:
-    fixed:
-    - Updated Docker image path
-  date: 2024-08-22 04:20:11
-- bump: patch
-  changes:
-    changed:
-    - Updated GCP Dockerfile to properly support launching off of start.sh
-  date: 2024-08-22 20:15:08
-- bump: patch
-  changes:
-    changed:
-    - Removed empty ENV call in Dockerfile
-  date: 2024-08-23 00:08:38
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.60.0
-  date: 2024-08-23 01:25:42
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 1.7.1
-  date: 2024-08-23 01:51:37
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.61.0
-  date: 2024-08-23 18:50:39
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.61.1
-  date: 2024-08-26 12:02:00
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.63.0
-  date: 2024-08-28 23:39:44
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.64.0
-  date: 2024-08-29 16:40:55
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.65.1
-  date: 2024-08-30 12:59:42
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.66.0
-  date: 2024-08-31 17:16:16
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.67.0
-  date: 2024-08-31 20:49:49
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.69.0
-  date: 2024-09-02 12:50:41
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.71.1.
-    - Update PolicyEngine Canada to 0.96.1.
-    - Update PolicyEngine UK to 1.7.3.
-  date: 2024-09-04 15:10:35
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.72.1
-  date: 2024-09-05 12:59:00
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.74.0
-  date: 2024-09-06 13:41:32
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.75.1
-  date: 2024-09-06 21:52:40
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.79.2
-  date: 2024-09-16 15:38:53
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 1.8.0
-  date: 2024-09-16 15:46:25
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.80.1
-  date: 2024-09-18 13:34:34
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.81.0
-  date: 2024-09-18 19:05:47
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.85.0
-  date: 2024-09-19 16:02:51
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.85.3
-  date: 2024-09-19 18:20:57
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.85.4
-  date: 2024-09-20 16:40:33
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.105.0
-  date: 2024-09-30 17:20:50
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.105.1
-  date: 2024-10-01 12:58:28
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.106.0
-  date: 2024-10-04 17:12:45
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.109.0
-  date: 2024-10-07 12:52:28
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.110.0
-  date: 2024-10-07 20:54:54
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.112.0
-  date: 2024-10-08 17:20:37
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.115.0
-  date: 2024-10-10 18:24:09
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.124.0
-  date: 2024-10-15 18:43:48
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.127.0
-  date: 2024-10-15 21:23:28
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.2.0
-  date: 2024-10-16 17:27:16
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.3.0
-  date: 2024-10-17 13:32:40
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.129.0
-  date: 2024-10-17 20:27:39
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.4.0
-  date: 2024-10-18 13:59:16
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.8.0
-  date: 2024-10-21 15:41:08
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.129.1
-  date: 2024-10-21 20:11:16
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.129.3
-  date: 2024-10-21 22:33:58
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.10.0
-  date: 2024-10-22 16:18:38
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.12.0
-  date: 2024-10-23 15:23:02
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.131.0
-  date: 2024-10-23 23:44:25
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.13.1
-  date: 2024-10-24 22:21:56
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.133.0
-  date: 2024-10-27 22:48:57
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.14.0
-  date: 2024-10-28 14:48:23
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.135.0
-  date: 2024-10-29 01:04:58
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.136.0
-  date: 2024-10-29 15:55:28
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.136.1
-  date: 2024-10-29 20:19:07
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.14.1
-  date: 2024-10-30 14:41:04
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.14.1
-  date: 2024-10-30 15:34:19
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.137.0
-  date: 2024-10-30 23:44:11
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.137.3
-  date: 2024-11-01 22:38:33
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.137.4
-  date: 2024-11-04 13:45:16
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.15.1
-  date: 2024-11-05 21:29:18
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.138.0
-  date: 2024-11-06 00:31:23
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.139.0
-  date: 2024-11-07 17:24:35
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.139.2
-  date: 2024-11-10 18:36:37
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.140.1
-  date: 2024-11-11 14:53:56
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.142.5
-  date: 2024-11-18 01:32:59
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.145.0
-  date: 2024-11-18 19:48:17
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.15.1
-  date: 2024-11-19 14:18:00
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.146.1
-  date: 2024-11-19 16:58:33
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.146.2
-  date: 2024-11-19 22:15:41
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.147.0
-  date: 2024-11-20 15:49:49
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.150.0
-  date: 2024-11-21 12:58:13
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.151.0
-  date: 2024-11-25 22:16:36
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.153.0
-  date: 2024-11-25 23:51:56
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.16.0
-  date: 2024-11-28 17:22:06
-- bump: patch
-  changes:
-    changed:
-    - Updated version of policyengine-canada to 0.96.2
-  date: 2024-12-04 20:01:36
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.18.0
-  date: 2024-12-05 16:44:13
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.160.0
-  date: 2024-12-05 19:13:55
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.161.0
-  date: 2024-12-12 14:42:36
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.161.2
-  date: 2024-12-16 19:11:28
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.162.1
-  date: 2024-12-23 15:12:03
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.176.0
-  date: 2025-01-17 14:55:32
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.176.3
-  date: 2025-01-20 12:58:50
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.179.0
-  date: 2025-01-21 11:01:14
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.180.1
-  date: 2025-01-22 15:50:25
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.182.2
-  date: 2025-01-28 16:26:26
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.183.1
-  date: 2025-01-29 18:10:38
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.184.0
-  date: 2025-01-30 15:18:32
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.185.0
-  date: 2025-01-31 15:01:53
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.186.0
-  date: 2025-01-31 17:02:58
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.18.0
-  date: 2025-02-04 14:56:46
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.187.1
-  date: 2025-02-04 16:45:47
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.189.0
-  date: 2025-02-07 14:03:04
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.191.0
-  date: 2025-02-11 00:46:34
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.18.0
-  date: 2025-02-11 23:33:18
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.195.1
-  date: 2025-02-13 22:02:29
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.196.0
-  date: 2025-02-14 19:56:39
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.198.0
-  date: 2025-02-19 00:09:59
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.199.0
-  date: 2025-02-19 23:16:25
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.202.0
-  date: 2025-02-20 22:38:46
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.19.1
-  date: 2025-02-21 17:42:43
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.202.1
-  date: 2025-02-24 16:09:54
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.202.2
-  date: 2025-02-24 23:55:42
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.19.3
-  date: 2025-02-26 13:49:03
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.203.0
-  date: 2025-02-28 00:51:18
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.21.0
-  date: 2025-02-28 17:18:25
-- bump: patch
-  changes:
-    added:
-    - Tests for sample household objects from clients
-  date: 2025-02-28 20:50:46
-- bump: minor
-  changes:
-    added:
-    - AI explainer feature; users can now take a computation tree and generate a human-readable
-      explanation of the computation of a particular variable
-    - Tools to flatten a nested household structure into an array of dictionaries
-      mapping to each variable for a given year
-    changed:
-    - Household computation now returns an (optional) computation tree alongside outputs
-  date: 2025-02-28 22:24:43
-- bump: patch
-  changes:
-    added:
-    - Customer test for Benefits Navigator
-    changed:
-    - Loosened schema requirements for US- and UK-specific entities
-    - Changed "year" to string-based "period" for filtering variables from household
-  date: 2025-03-01 15:33:35
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.22.0
-  date: 2025-03-03 20:50:08
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.205.0
-  date: 2025-03-04 20:47:56
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.207.0
-  date: 2025-03-05 14:47:06
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.207.3
-  date: 2025-03-07 12:05:04
-- bump: patch
-  changes:
-    added:
-    - Impactica customer integration test
-  date: 2025-03-07 19:22:43
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.209.0
-  date: 2025-03-10 18:20:25
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.212.0
-  date: 2025-03-12 23:12:22
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.220.0
-  date: 2025-03-19 22:48:41
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.221.0
-  date: 2025-03-20 18:10:01
-- bump: patch
-  changes:
-    added:
-    - Re-enabled automated analytics logging of calculate endpoint
-  date: 2025-03-26 01:09:47
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.22.4
-  date: 2025-03-26 01:10:31
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.22.6
-  date: 2025-03-27 01:53:25
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.239.0
-  date: 2025-04-01 18:21:27
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.240.1
-  date: 2025-04-01 22:48:01
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.244.0
-  date: 2025-04-04 22:55:24
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.24.0
-  date: 2025-04-16 19:06:48
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.254.0
-  date: 2025-04-21 21:05:19
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.264.0
-  date: 2025-05-01 15:54:07
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.265.0
-  date: 2025-05-05 20:48:14
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.269.2
-  date: 2025-05-10 00:39:54
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.270.2
-  date: 2025-05-12 15:28:58
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.279.0
-  date: 2025-05-13 16:41:01
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.287.0
-  date: 2025-05-20 19:51:14
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.289.1
-  date: 2025-05-22 21:44:12
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.295.0
-  date: 2025-05-27 15:28:37
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.297.2
-  date: 2025-05-28 15:30:56
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.300.0
-  date: 2025-06-02 15:57:45
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.302.0
-  date: 2025-06-03 16:21:27
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.305.0
-  date: 2025-06-05 21:25:41
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine UK to 2.31.0
-  date: 2025-06-09 22:07:29
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.313.0
-  date: 2025-06-16 15:22:02
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.328.0
-  date: 2025-06-30 19:41:23
-- bump: minor
-  changes:
-    changed:
-    - Upgrade Python version requirement from 3.10 to 3.13
-  date: 2025-07-30 22:49:16
-- bump: patch
-  changes:
-    changed:
-    - Update Docker build address to use GitHub Container Registry
-  date: 2025-08-02 18:39:28
-- bump: patch
-  changes:
-    changed:
-    - Increased readiness check timeout to 600 seconds.
-  date: 2025-08-06 19:58:12
-- bump: patch
-  changes:
-    changed:
-    - Allowed use of Python 3.12.
-    - Increased memory from 8GB to 16GB.
-  date: 2025-08-06 23:44:51
-- bump: patch
-  changes:
-    changed:
-    - Decreased memory from 16GB to 12GB.
-  date: 2025-08-07 00:13:08
-- bump: patch
-  changes:
-    fixed:
-    - No branching for itemization.
-    - Lower memory back to pre-change 8GB.
-  date: 2025-08-07 16:24:30
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.330.0
-  date: 2025-08-07 17:25:33
-- bump: patch
-  changes:
-    changed:
-    - Switched to use of in-memory storage for rate limiting instead of Redis.
-  date: 2025-08-10 13:01:44
-- bump: patch
-  changes:
-    changed:
-    - Modified Docker deployment workflow to use pre-built image via multi-stage build.
-  date: 2025-08-12 02:51:19
-- bump: patch
-  changes:
-    changed:
-    - Added missing credentials to push workflow.
-  date: 2025-08-12 02:59:07
-- bump: patch
-  changes:
-    changed:
-    - Various fixes to the deployment workflow.
-  date: 2025-08-12 06:38:03
-- bump: patch
-  changes:
-    changed:
-    - Change the default image tag to `latest` in the production deployment workflow.
-  date: 2025-08-12 14:20:01
-- bump: patch
-  changes:
-    changed:
-    - Modified tag to launch from
-  date: 2025-08-12 14:54:59
-- bump: patch
-  changes:
-    changed:
-    - Fixed GCP deploy tag on Artifact Registry image
-  date: 2025-08-12 15:10:39
-- bump: patch
-  changes:
-    changed:
-    - Fixed launch tag syntax
-  date: 2025-08-12 15:26:20
-- bump: patch
-  changes:
-    changed:
-    - Correct env var setup in deploy-production.yml
-  date: 2025-08-12 15:44:48
-- bump: patch
-  changes:
-    changed:
-    - Made various fixes to Dockerfile and GCP deployment scripts.
-  date: 2025-08-12 20:20:34
-- bump: patch
-  changes:
-    changed:
-    - Replaced custom GCP deploy script with official Google action.
-    - Re-enabled itemized deductions to prevent UK service outage.
-  date: 2025-08-13 00:37:02
-- bump: patch
-  changes:
-    removed:
-    - Manual promotion of GCP image post-deploy; instead, promote at time of deploy.
-  date: 2025-08-13 00:59:30
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.370.1
-  date: 2025-08-13 23:55:10
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.375.0
-  date: 2025-08-21 14:43:24
-- bump: patch
-  changes:
-    added:
-    - Production Docker image now deploys to both GitHub Container Registry and Google
-      Artifact Registry
-  date: 2025-08-22 18:04:20
-- bump: patch
-  changes:
-    added:
-    - First, unimplemented version of deploy config files
-  date: 2025-08-26 16:41:06
-- bump: minor
-  changes:
-    added:
-    - Created config loader to load custom configuration files; this remains unused
-  date: 2025-08-26 23:33:33
-- bump: minor
-  changes:
-    added:
-    - Capability to optionally opt into user analytics structure
-    - Reverse-compatible structure to allow us to deploy with user analytics enabled
-  date: 2025-08-27 02:21:05
-- bump: minor
-  changes:
-    changed:
-    - Decoupled auth0 setup logic from main app logic.
-    - Updated configuration structure to support new decoupled auth0 setup.
-  date: 2025-08-27 23:15:50
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.380.0
-  date: 2025-08-29 01:24:00
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.384.0
-  date: 2025-08-29 21:13:07
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.386.0
-  date: 2025-09-01 13:53:12
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.387.0
-  date: 2025-09-02 15:25:12
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.389.0
-  date: 2025-09-02 23:43:07
-- bump: minor
-  changes:
-    changed:
-    - Fixed code that makes environment variables optional for auth0 configuration
-    - Fixed code that makes environment variables optional for analytics tracking
-      configuration
-    - Made environment variables configurable for AI-powered endpoints
-  date: 2025-09-03 00:22:35
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.398.1
-  date: 2025-09-16 16:31:57
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.402.1
-  date: 2025-09-22 21:57:28
-- bump: patch
-  changes:
-    changed:
-    - Migrated from pkg_resources to importlib for package management utilities.
-  date: 2025-10-10 19:56:19
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.413.0
-  date: 2025-10-10 21:03:26
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.423.0
-  date: 2025-10-20 13:58:09
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.452.0
-  date: 2025-12-09 00:51:17
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.460.0
-  date: 2025-12-12 23:50:15
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.485.0
-  date: 2025-12-30 00:06:02
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.502.3
-  date: 2026-01-15 23:07:16
-- bump: minor
-  changes:
-    added:
-    - Add GitHub Actions workflow for weekly policyengine-us updates with changelog
-      summary generation.
-  date: 2026-01-16 18:07:34
-- bump: minor
-  changes:
-    added:
-    - Docker Compose support for local development with Redis
-    - Makefile targets for building and running Docker containers
-    - Support for external Docker networks when running alongside other PolicyEngine
-      services
-  date: 2026-01-19 14:04:10
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.511.1
-  date: 2026-01-21 22:21:35
-- bump: patch
-  changes:
-    fixed:
-    - Fix PR edit permission error in weekly update workflow by using REST API instead
-      of GraphQL.
-  date: 2026-01-29 03:19:47
-- bump: patch
-  changes:
-    changed:
-    - Update PolicyEngine US to 1.532.0
-  date: 2026-01-29 03:36:34
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 00000000..83ee6205
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,82 @@
+[project]
+name = "policyengine-household-api"
+version = "0.13.3"
+description = "PolicyEngine Household API"
+readme = "README.md"
+authors = [
+    { name = "PolicyEngine", email = "hello@policyengine.org" }
+]
+requires-python = ">=3.12"
+dependencies = [
+    "Authlib>=1.3.1",
+    "Flask-Caching==2.0.2",
+    "Flask-Limiter",
+    "anthropic",
+    "black==24.3.0",
+    "cloud-sql-python-connector",
+    "flask-cors>=3",
+    "flask-sqlalchemy>=3",
+    "flask>=2.2",
+    "google-cloud-logging",
+    "google-cloud-storage",
+    "gunicorn",
+    "inflect",
+    "policyengine-il==0.1.0",
+    "policyengine-ng==0.5.1",
+    "policyengine_canada==0.96.3",
+    "policyengine_uk==2.31.0",
+    "policyengine_us==1.532.0",
+    "pydantic",
+    "pyjwt",
+    "pymysql",
+    "python-dotenv",
+    "urllib3<1.27,>=1.21.1",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project.optional-dependencies]
+dev = [
+    "build",
+    "pytest",
+    "pytest-timeout",
+    "towncrier>=24.8.0",
+]
+
+[tool.hatch.build.targets.wheel]
+packages = ["policyengine_household_api"]
+
+[tool.towncrier]
+package = "policyengine_household_api"
+directory = "changelog.d"
+filename = "CHANGELOG.md"
+title_format = "## [{version}] - {project_date}"
+issue_format = ""
+underlines = ["", "", ""]
+
+[[tool.towncrier.type]]
+directory = "breaking"
+name = "Breaking changes"
+showcontent = true
+
+[[tool.towncrier.type]]
+directory = "added"
+name = "Added"
+showcontent = true
+
+[[tool.towncrier.type]]
+directory = "changed"
+name = "Changed"
+showcontent = true
+
+[[tool.towncrier.type]]
+directory = "fixed"
+name = "Fixed"
+showcontent = true
+
+[[tool.towncrier.type]]
+directory = "removed"
+name = "Removed"
+showcontent = true
diff --git a/setup.py b/setup.py
deleted file mode 100644
index c8f6ac11..00000000
--- a/setup.py
+++ /dev/null
@@ -1,42 +0,0 @@
-from setuptools import setup, find_packages
-from policyengine_household_api.constants import __version__
-
-setup(
-    name="policyengine-household-api",
-    version=__version__,
-    author="PolicyEngine",
-    author_email="hello@policyengine.org",
-    description="PolicyEngine Household API",
-    packages=find_packages(),
-    python_requires=">=3.12",
-    install_requires=[
-        "anthropic",
-        "Authlib>=1.3.1",
-        "cloud-sql-python-connector",
-        "flask>=2.2",
-        "flask-cors>=3",
-        "flask-sqlalchemy>=3",
-        "google-cloud-logging",
-        "google-cloud-storage",
-        "gunicorn",
-        "inflect",
-        "policyengine_canada==0.96.3",
-        "policyengine-ng==0.5.1",
-        "policyengine-il==0.1.0",
-        "policyengine_uk==2.31.0",
-        "policyengine_us==1.532.0",
-        "pyjwt",
-        "Flask-Caching==2.0.2",
-        "urllib3<1.27,>=1.21.1",
-        "python-dotenv",
-        "pymysql",
-        "black==24.3.0",
-        "Flask-Limiter",
-        "pydantic",
-    ],
-    extras_require={
-        "dev": [
-            "pytest-timeout",
-        ],
-    },
-)
diff --git a/tests/fixtures/endpoints/household_explainer.py b/tests/fixtures/endpoints/household_explainer.py
index 5f3b0f89..52005529 100644
--- a/tests/fixtures/endpoints/household_explainer.py
+++ b/tests/fixtures/endpoints/household_explainer.py
@@ -229,11 +229,14 @@ def config_side_effect(key, default=None):
         return default
 
     # Patch both locations where get_config_value is used
-    with patch(
-        "policyengine_household_api.utils.computation_tree.get_config_value",
-        side_effect=config_side_effect,
-    ), patch(
-        "policyengine_household_api.endpoints.household_explainer.get_config_value",
-        side_effect=config_side_effect,
+    with (
+        patch(
+            "policyengine_household_api.utils.computation_tree.get_config_value",
+            side_effect=config_side_effect,
+        ),
+        patch(
+            "policyengine_household_api.endpoints.household_explainer.get_config_value",
+            side_effect=config_side_effect,
+        ),
     ):
         yield