diff --git a/functions/grapher/thumbnail/[slug].ts b/functions/grapher/thumbnail/[slug].ts
index b8bcbadaae0..b5efae2ac13 100644
--- a/functions/grapher/thumbnail/[slug].ts
+++ b/functions/grapher/thumbnail/[slug].ts
@@ -6,6 +6,7 @@ export interface Env {
         fetch: typeof fetch
     }
     url: URL
+    ENV: string
 }
 
 const router = Router<IRequestStrict, [URL, Env, ExecutionContext]>()
diff --git a/ops/buildkite/deploy-content b/ops/buildkite/deploy-content
index f4befe9d5d7..4df42f708bb 100755
--- a/ops/buildkite/deploy-content
+++ b/ops/buildkite/deploy-content
@@ -115,6 +115,7 @@ create_dist() {
 
     # copy over Pages Functions as-is
     rsync -havzq --delete owid-grapher/functions dist/
+    rsync -havzq owid-grapher/wrangler.toml dist/
 
     # we need node_modules for Pages Functions
     rm -rf dist/node_modules
diff --git a/ops/buildkite/deploy-content-preview b/ops/buildkite/deploy-content-preview
index 02718b546ce..db852e2bf2f 100755
--- a/ops/buildkite/deploy-content-preview
+++ b/ops/buildkite/deploy-content-preview
@@ -143,6 +143,7 @@ create_dist() {
 
     # copy over Pages Functions as-is
     as_owid rsync -havzq --delete owid-grapher/functions dist/
+    as_owid rsync -havzq owid-grapher/wrangler.toml dist/
 
     # we need node_modules for Pages Functions
     as_owid rm -rf dist/node_modules
diff --git a/package.json b/package.json
index 40cb9c62e5b..e1cc7f51dbb 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
         "revertLastDbMigration": "tsx --tsconfig tsconfig.tsx.json node_modules/typeorm/cli.js migration:revert -d db/dataSource.ts",
         "startAdminServer": "node --enable-source-maps ./itsJustJavascript/adminSiteServer/app.js",
         "startAdminDevServer": "tsx watch --ignore '**.mjs' --tsconfig tsconfig.tsx.json adminSiteServer/app.tsx",
-        "startLocalCloudflareFunctions": "wrangler pages dev localBake --compatibility-date 2023-10-09",
+        "startLocalCloudflareFunctions": "wrangler pages dev",
         "startDeployQueueServer": "node --enable-source-maps ./itsJustJavascript/baker/startDeployQueueServer.js",
         "startLernaWatcher": "lerna watch --scope '@ourworldindata/*' -- lerna run build --scope=\\$LERNA_PACKAGE_NAME --include-dependents",
         "startTmuxServer": "node_modules/tmex/tmex dev \"yarn startLernaWatcher\" \"yarn startAdminDevServer\" \"yarn startViteServer\"",
@@ -239,7 +239,7 @@
         "tsx": "^4.16.2",
         "vite": "^5.3.4",
         "vite-plugin-checker": "^0.7.2",
-        "wrangler": "^3.61.0"
+        "wrangler": "^3.68.0"
     },
     "prettier": {
         "trailingComma": "es5",
diff --git a/wrangler.toml b/wrangler.toml
new file mode 100644
index 00000000000..4d88b657784
--- /dev/null
+++ b/wrangler.toml
@@ -0,0 +1,23 @@
+# Generated by Wrangler on Mon Aug 05 2024 16:52:18 GMT+0000 (GMT)
+name = "owid"
+compatibility_date = "2024-04-29"
+pages_build_output_dir = "./localBake"
+
+# Vars that should be available in all envs, including local dev
+[vars]
+ENV = "development"
+
+# Overrides for CF preview deployments
+[env.preview.vars]
+MAILGUN_DOMAIN = "mg.ourworldindata.org"
+SLACK_ERROR_CHANNEL_ID = "C016H0BNNB1"
+ENV = "preview"
+
+# Overrides for CF production deployment
+[env.production]
+compatibility_date = "2024-04-29"
+
+[env.production.vars]
+ENV = "production"
+MAILGUN_DOMAIN = "mg.ourworldindata.org"
+SLACK_ERROR_CHANNEL_ID = "C5JJW19PS"
diff --git a/yarn.lock b/yarn.lock
index 638fb4d94a5..933ce200e2f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1520,46 +1520,46 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@cloudflare/kv-asset-handler@npm:0.3.3":
-  version: 0.3.3
-  resolution: "@cloudflare/kv-asset-handler@npm:0.3.3"
+"@cloudflare/kv-asset-handler@npm:0.3.4":
+  version: 0.3.4
+  resolution: "@cloudflare/kv-asset-handler@npm:0.3.4"
   dependencies:
     mime: "npm:^3.0.0"
-  checksum: 10/020ef0a6f7f70f8cdcecd5d8c6cd3938a80205c5e4561255d8f6d6ad6be4bf231961a62c6a8d0cf94dab1cea249cc81064b8670fdbac2eb13a006b1f34a759c4
+  checksum: 10/f02840c2da8e75f3dbfe769f3ba99b99fb87b438c518c06c279334882ce7745ba5dd7ab66a07695dde0596e297758ce66761f9aac2365e7dfb83d7001cd44afa
   languageName: node
   linkType: hard
 
-"@cloudflare/workerd-darwin-64@npm:1.20240610.1":
-  version: 1.20240610.1
-  resolution: "@cloudflare/workerd-darwin-64@npm:1.20240610.1"
+"@cloudflare/workerd-darwin-64@npm:1.20240725.0":
+  version: 1.20240725.0
+  resolution: "@cloudflare/workerd-darwin-64@npm:1.20240725.0"
   conditions: os=darwin & cpu=x64
   languageName: node
   linkType: hard
 
-"@cloudflare/workerd-darwin-arm64@npm:1.20240610.1":
-  version: 1.20240610.1
-  resolution: "@cloudflare/workerd-darwin-arm64@npm:1.20240610.1"
+"@cloudflare/workerd-darwin-arm64@npm:1.20240725.0":
+  version: 1.20240725.0
+  resolution: "@cloudflare/workerd-darwin-arm64@npm:1.20240725.0"
   conditions: os=darwin & cpu=arm64
   languageName: node
   linkType: hard
 
-"@cloudflare/workerd-linux-64@npm:1.20240610.1":
-  version: 1.20240610.1
-  resolution: "@cloudflare/workerd-linux-64@npm:1.20240610.1"
+"@cloudflare/workerd-linux-64@npm:1.20240725.0":
+  version: 1.20240725.0
+  resolution: "@cloudflare/workerd-linux-64@npm:1.20240725.0"
   conditions: os=linux & cpu=x64
   languageName: node
   linkType: hard
 
-"@cloudflare/workerd-linux-arm64@npm:1.20240610.1":
-  version: 1.20240610.1
-  resolution: "@cloudflare/workerd-linux-arm64@npm:1.20240610.1"
+"@cloudflare/workerd-linux-arm64@npm:1.20240725.0":
+  version: 1.20240725.0
+  resolution: "@cloudflare/workerd-linux-arm64@npm:1.20240725.0"
   conditions: os=linux & cpu=arm64
   languageName: node
   linkType: hard
 
-"@cloudflare/workerd-windows-64@npm:1.20240610.1":
-  version: 1.20240610.1
-  resolution: "@cloudflare/workerd-windows-64@npm:1.20240610.1"
+"@cloudflare/workerd-windows-64@npm:1.20240725.0":
+  version: 1.20240725.0
+  resolution: "@cloudflare/workerd-windows-64@npm:1.20240725.0"
   conditions: os=win32 & cpu=x64
   languageName: node
   linkType: hard
@@ -8460,6 +8460,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"date-fns@npm:^3.6.0":
+  version: 3.6.0
+  resolution: "date-fns@npm:3.6.0"
+  checksum: 10/cac35c58926a3b5d577082ff2b253612ec1c79eb6754fddef46b6a8e826501ea2cb346ecbd211205f1ba382ddd1f9d8c3f00bf433ad63cc3063454d294e3a6b8
+  languageName: node
+  linkType: hard
+
 "dateformat@npm:^3.0.3":
   version: 3.0.3
   resolution: "dateformat@npm:3.0.3"
@@ -11072,7 +11079,7 @@ __metadata:
     vite-plugin-checker: "npm:^0.7.2"
     webfontloader: "npm:^1.6.28"
     workerpool: "npm:^6.2.0"
-    wrangler: "npm:^3.61.0"
+    wrangler: "npm:^3.68.0"
     yaml: "npm:^2.4.2"
   languageName: unknown
   linkType: soft
@@ -14113,9 +14120,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"miniflare@npm:3.20240610.1":
-  version: 3.20240610.1
-  resolution: "miniflare@npm:3.20240610.1"
+"miniflare@npm:3.20240725.0":
+  version: 3.20240725.0
+  resolution: "miniflare@npm:3.20240725.0"
   dependencies:
     "@cspotcode/source-map-support": "npm:0.8.1"
     acorn: "npm:^8.8.0"
@@ -14125,13 +14132,13 @@ __metadata:
     glob-to-regexp: "npm:^0.4.1"
     stoppable: "npm:^1.1.0"
     undici: "npm:^5.28.4"
-    workerd: "npm:1.20240610.1"
-    ws: "npm:^8.14.2"
+    workerd: "npm:1.20240725.0"
+    ws: "npm:^8.17.1"
     youch: "npm:^3.2.2"
     zod: "npm:^3.22.3"
   bin:
     miniflare: bootstrap.js
-  checksum: 10/ebd4d979294af03838c86275503f9f9c6d55fd4f17aafbd07421252660521ae48229358fa9ea06a1d24c052ce0de471c75213dbf6ad19e78a8b641b092881b5c
+  checksum: 10/6def8bf81c4a05e70b6b5fc0c422d0f90f5fdea93f15272281a16a0f51b93bb42c90efa75aae09848f6db6442bc6996e41e2c340fc779e115e5d0fe2b4d9a3e9
   languageName: node
   linkType: hard
 
@@ -20471,15 +20478,15 @@ __metadata:
   languageName: node
   linkType: hard
 
-"workerd@npm:1.20240610.1":
-  version: 1.20240610.1
-  resolution: "workerd@npm:1.20240610.1"
+"workerd@npm:1.20240725.0":
+  version: 1.20240725.0
+  resolution: "workerd@npm:1.20240725.0"
   dependencies:
-    "@cloudflare/workerd-darwin-64": "npm:1.20240610.1"
-    "@cloudflare/workerd-darwin-arm64": "npm:1.20240610.1"
-    "@cloudflare/workerd-linux-64": "npm:1.20240610.1"
-    "@cloudflare/workerd-linux-arm64": "npm:1.20240610.1"
-    "@cloudflare/workerd-windows-64": "npm:1.20240610.1"
+    "@cloudflare/workerd-darwin-64": "npm:1.20240725.0"
+    "@cloudflare/workerd-darwin-arm64": "npm:1.20240725.0"
+    "@cloudflare/workerd-linux-64": "npm:1.20240725.0"
+    "@cloudflare/workerd-linux-arm64": "npm:1.20240725.0"
+    "@cloudflare/workerd-windows-64": "npm:1.20240725.0"
   dependenciesMeta:
     "@cloudflare/workerd-darwin-64":
       optional: true
@@ -20493,7 +20500,7 @@ __metadata:
       optional: true
   bin:
     workerd: bin/workerd
-  checksum: 10/c37cd30c25fbdc7f97a296cf4b1a8ad2dbb65621a9c4b4bb24cb8fc00d9674c6610c5d2e5dc87c6cda83aa7b3b23a63d84b924ec1d9a3881622a9284590723f6
+  checksum: 10/0957136cb6793b6b68ea6c76584a3f803fcd980cecdd1bd4f493be3ff5df85a66bd05b4e218d02f14db196632177f5b3a5d86f89c0d20952b36350950dd66946
   languageName: node
   linkType: hard
 
@@ -20504,18 +20511,19 @@ __metadata:
   languageName: node
   linkType: hard
 
-"wrangler@npm:^3.61.0":
-  version: 3.61.0
-  resolution: "wrangler@npm:3.61.0"
+"wrangler@npm:^3.68.0":
+  version: 3.68.0
+  resolution: "wrangler@npm:3.68.0"
   dependencies:
-    "@cloudflare/kv-asset-handler": "npm:0.3.3"
+    "@cloudflare/kv-asset-handler": "npm:0.3.4"
     "@esbuild-plugins/node-globals-polyfill": "npm:^0.2.3"
     "@esbuild-plugins/node-modules-polyfill": "npm:^0.2.2"
     blake3-wasm: "npm:^2.1.5"
     chokidar: "npm:^3.5.3"
+    date-fns: "npm:^3.6.0"
     esbuild: "npm:0.17.19"
     fsevents: "npm:~2.3.2"
-    miniflare: "npm:3.20240610.1"
+    miniflare: "npm:3.20240725.0"
     nanoid: "npm:^3.3.3"
     path-to-regexp: "npm:^6.2.0"
     resolve: "npm:^1.22.8"
@@ -20523,9 +20531,10 @@ __metadata:
     selfsigned: "npm:^2.0.1"
     source-map: "npm:^0.6.1"
     unenv: "npm:unenv-nightly@1.10.0-1717606461.a117952"
+    workerd: "npm:1.20240725.0"
     xxhash-wasm: "npm:^1.0.1"
   peerDependencies:
-    "@cloudflare/workers-types": ^4.20240605.0
+    "@cloudflare/workers-types": ^4.20240725.0
   dependenciesMeta:
     fsevents:
       optional: true
@@ -20535,7 +20544,7 @@ __metadata:
   bin:
     wrangler: bin/wrangler.js
     wrangler2: bin/wrangler.js
-  checksum: 10/91594c182fbfa65ffb1d3946829c3a51258d2ce6d7c83f0447f043e3bdb237096c4c69eda5e028f1e9742d8c0ddeae01c87512f438ab3635c5db9e923da3412b
+  checksum: 10/9d9884562f632de510c3755694822edaf530b875624b61188784ad56e9dc63e4daf900f8565c8271d7b30220e653cc2c1f787ee9fafef3d980f2806a583d1003
   languageName: node
   linkType: hard
 
@@ -20646,7 +20655,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"ws@npm:^8.11.0, ws@npm:^8.14.2":
+"ws@npm:^8.11.0":
   version: 8.17.1
   resolution: "ws@npm:8.17.1"
   peerDependencies:
@@ -20661,6 +20670,21 @@ __metadata:
   languageName: node
   linkType: hard
 
+"ws@npm:^8.17.1":
+  version: 8.18.0
+  resolution: "ws@npm:8.18.0"
+  peerDependencies:
+    bufferutil: ^4.0.1
+    utf-8-validate: ">=5.0.2"
+  peerDependenciesMeta:
+    bufferutil:
+      optional: true
+    utf-8-validate:
+      optional: true
+  checksum: 10/70dfe53f23ff4368d46e4c0b1d4ca734db2c4149c6f68bc62cb16fc21f753c47b35fcc6e582f3bdfba0eaeb1c488cddab3c2255755a5c3eecb251431e42b3ff6
+  languageName: node
+  linkType: hard
+
 "xml-name-validator@npm:^4.0.0":
   version: 4.0.0
   resolution: "xml-name-validator@npm:4.0.0"