diff --git a/.github/workflows/merge-check.yml b/.github/workflows/merge-check.yml
new file mode 100644
index 000000000..e7dc943f8
--- /dev/null
+++ b/.github/workflows/merge-check.yml
@@ -0,0 +1,45 @@
+name: Merge Check
+
+"on":
+  pull_request:
+    branches:
+      - "main"
+
+# Cancel any in-flight jobs
+concurrency:
+  group: ${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
+          cache: pipenv
+
+      - name: Install Python dependencies
+        run: |
+          pip install pipenv
+          # pipenv install
+          pipenv sync
+
+      - name: Run DVC pipelines
+        run: |
+          pipenv run dvc --version
+          pipenv run dvc update -R working
+          pipenv run dvc repro -R scripts
+
+      - name: Setup Deno
+        uses: denoland/setup-deno@v1
+        with:
+          deno-version: v1.x
+
+      - name: Build site
+        shell: bash
+        run: deno task build
diff --git a/.gitignore b/.gitignore
index c3115aa24..1e77d1455 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,8 @@ design/data/
 __pycache__
 /MM23_variable_lookup.csv
 .env
+
+# Debugging files
+*.cpuprofile
+*.heapprofile
+*.heapsnapshot
\ No newline at end of file
diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 000000000..683ac9f5a
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,21 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "request": "launch",
+      "name": "Debug site",
+      "type": "node",
+      // "program": "${workspaceFolder}/main.ts",
+      "cwd": "${workspaceFolder}",
+      "runtimeExecutable": "/home/giles/.deno/bin/deno",
+      "runtimeArgs": [
+        "task",
+        "lume_debug",
+      ],
+      "attachSimplePort": 9229
+    }
+  ]
+}
\ No newline at end of file
diff --git a/_config.js b/_config.js
index 6d082fbbc..934a584e3 100644
--- a/_config.js
+++ b/_config.js
@@ -111,7 +111,7 @@ site.use(date({
 }));
 
 // Add csv loader
-site.loadData(['.csv'], csvLoader);
+site.loadData(['.csv'], csvLoader());
 site.loadData(['.geojson', '.hexjson'], jsonLoader);
 site.loadData(['.md']);
 
diff --git a/deno.json b/deno.json
index d125f977b..bf850ca21 100644
--- a/deno.json
+++ b/deno.json
@@ -4,7 +4,8 @@
     "lume": "echo \"import 'lume/cli.ts'\" | deno run --v8-flags=--max-old-space-size=2048 --unstable -A -",
     "build": "deno task lume",
     "serve": "deno task lume -s",
-    "validate": "deno run --allow-env --allow-read=src/_data/reports --allow-write=lib lib/validate.ts"
+    "validate": "deno run --allow-env --allow-read=src/_data/reports --allow-write=lib lib/validate.ts",
+    "lume_debug": "echo \"import 'lume/cli.ts'\" | deno run --inspect-wait --v8-flags=--max-old-space-size=2048 --allow-all -"
   },
   "lock": false,
   "compilerOptions": {
diff --git a/import_map.json b/import_map.json
index 6e4f19f98..2e167c33f 100644
--- a/import_map.json
+++ b/import_map.json
@@ -6,6 +6,6 @@
     "lume/": "https://deno.land/x/lume@v1.17.3/",
     "local/": "./local-lib/",
     "std/": "https://deno.land/std@0.82.0/",
-    "oi-lume-utils/": "https://deno.land/x/oi_lume_utils@v0.3.1/"
+    "oi-lume-utils/": "https://deno.land/x/oi_lume_utils@v0.4.0/"
   }
 }