diff --git a/api.planx.uk/package.json b/api.planx.uk/package.json
index ab680ac837..0d6fde610d 100644
--- a/api.planx.uk/package.json
+++ b/api.planx.uk/package.json
@@ -2,6 +2,7 @@
   "name": "api.planx.uk",
   "license": "MPL-2.0",
   "private": true,
+  "packageManager": "pnpm@8.6.6",
   "dependencies": {
     "@airbrake/node": "^2.1.8",
     "@opensystemslab/planx-core": "git+https://github.com/theopensystemslab/planx-core#b975cf9",
diff --git a/e2e/package.json b/e2e/package.json
index c5888413e4..5151d20aed 100644
--- a/e2e/package.json
+++ b/e2e/package.json
@@ -20,6 +20,7 @@
       "prettier -w ./tests"
     ]
   },
+  "packageManager": "pnpm@8.6.6",
   "devDependencies": {
     "@types/node": "18.16.1",
     "@typescript-eslint/eslint-plugin": "^5.62.0",
diff --git a/e2e/tests/api-driven/package.json b/e2e/tests/api-driven/package.json
index 3fb3256b3e..6fb4c3bbd6 100644
--- a/e2e/tests/api-driven/package.json
+++ b/e2e/tests/api-driven/package.json
@@ -4,6 +4,7 @@
     "test": "cucumber-js --tags 'not @regression'",
     "test:regression": "cucumber-js"
   },
+  "packageManager": "pnpm@8.6.6",
   "dependencies": {
     "@cucumber/cucumber": "^9.3.0",
     "@opensystemslab/planx-core": "git+https://github.com/theopensystemslab/planx-core#b975cf9",
diff --git a/e2e/tests/ui-driven/package.json b/e2e/tests/ui-driven/package.json
index 99eada8d2b..2d115ebd2d 100644
--- a/e2e/tests/ui-driven/package.json
+++ b/e2e/tests/ui-driven/package.json
@@ -19,6 +19,7 @@
     "serve": "^14.2.1",
     "uuid": "^9.0.1"
   },
+  "packageManager": "pnpm@8.6.6",
   "devDependencies": {
     "@playwright/test": "^1.40.1",
     "@types/node": "18.16.1",
diff --git a/editor.planx.uk/package.json b/editor.planx.uk/package.json
index f96b12fb79..044a921413 100644
--- a/editor.planx.uk/package.json
+++ b/editor.planx.uk/package.json
@@ -158,6 +158,7 @@
     "typescript": "^5.4.3",
     "webpack": "^5.91.0"
   },
+  "packageManager": "pnpm@8.6.6",
   "scripts": {
     "start": "craco start",
     "build": "CI=false && craco build",
diff --git a/hasura.planx.uk/package.json b/hasura.planx.uk/package.json
index 1b859f4845..19bf95a16c 100644
--- a/hasura.planx.uk/package.json
+++ b/hasura.planx.uk/package.json
@@ -5,6 +5,7 @@
   "scripts": {
     "start": "hasura console --envfile ./../.env"
   },
+  "packageManager": "pnpm@8.6.6",
   "pnpm": {
     "overrides": {
       "follow-redirects@<=1.15.5": ">=1.15.6"
diff --git a/infrastructure/application/package.json b/infrastructure/application/package.json
index 9847b6ec4e..aa65adf6d6 100644
--- a/infrastructure/application/package.json
+++ b/infrastructure/application/package.json
@@ -19,6 +19,7 @@
   "scripts": {
     "build-editor": "cd ../../editor.planx.uk && pnpm build"
   },
+  "packageManager": "pnpm@8.6.6",
   "pnpm": {
     "overrides": {
       "protobufjs@>=7.0.0 <7.2.5": ">=7.2.5",
diff --git a/infrastructure/certificates/package.json b/infrastructure/certificates/package.json
index 09511d2a7d..ab8d8e38cf 100644
--- a/infrastructure/certificates/package.json
+++ b/infrastructure/certificates/package.json
@@ -10,6 +10,7 @@
     "@pulumi/pulumi": "^3.0.0",
     "tldjs": "^2.3.1"
   },
+  "packageManager": "pnpm@8.6.6",
   "pnpm": {
     "overrides": {
       "protobufjs": ">=7.2.4",
diff --git a/infrastructure/data/package.json b/infrastructure/data/package.json
index ddb789481e..8ee29c4301 100644
--- a/infrastructure/data/package.json
+++ b/infrastructure/data/package.json
@@ -7,6 +7,7 @@
     "@pulumi/awsx": "^0.30.0",
     "@pulumi/pulumi": "^3.74.0"
   },
+  "packageManager": "pnpm@8.6.6",
   "pnpm": {
     "overrides": {
       "protobufjs@>=7.0.0 <7.2.5": ">=7.2.5",
diff --git a/infrastructure/networking/package.json b/infrastructure/networking/package.json
index ddb789481e..8ee29c4301 100644
--- a/infrastructure/networking/package.json
+++ b/infrastructure/networking/package.json
@@ -7,6 +7,7 @@
     "@pulumi/awsx": "^0.30.0",
     "@pulumi/pulumi": "^3.74.0"
   },
+  "packageManager": "pnpm@8.6.6",
   "pnpm": {
     "overrides": {
       "protobufjs@>=7.0.0 <7.2.5": ">=7.2.5",
diff --git a/scripts/encrypt/package.json b/scripts/encrypt/package.json
index bed04c82bc..47f53c4676 100644
--- a/scripts/encrypt/package.json
+++ b/scripts/encrypt/package.json
@@ -7,6 +7,7 @@
     "encrypt": "ts-node encrypt.ts",
     "decrypt": "ts-node decrypt.ts"
   },
+  "packageManager": "pnpm@8.6.6",
   "keywords": [],
   "dependencies": {
     "@opensystemslab/planx-core": "git+https://github.com/theopensystemslab/planx-core#722e1c7",
diff --git a/sharedb.planx.uk/package.json b/sharedb.planx.uk/package.json
index bbbf9a5532..9841fc0c35 100644
--- a/sharedb.planx.uk/package.json
+++ b/sharedb.planx.uk/package.json
@@ -15,6 +15,7 @@
     "dev": "node-dev server.js",
     "start": "node server.js"
   },
+  "packageManager": "pnpm@8.6.6",
   "devDependencies": {
     "node-dev": "^8.0.0"
   },