diff --git a/.circleci/config.yml b/.circleci/config.yml
index fe86e6a..e1c62ea 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,8 +3,7 @@
 
 references:
 
-  container_config_node:
-    &container_config_node
+  container_config_node: &container_config_node
     working_directory: ~/project/build
     docker:
       - image: cimg/node:<< parameters.node-version >>-browsers
@@ -15,47 +14,39 @@ references:
 
   workspace_root: &workspace_root ~/project
 
-  attach_workspace:
-    &attach_workspace
+  attach_workspace: &attach_workspace
     attach_workspace:
       at: *workspace_root
 
-  npm_cache_keys:
-    &npm_cache_keys
+  npm_cache_keys: &npm_cache_keys
     keys:
       - v6-dependency-npm-{{ checksum "package.json" }}-
       - v6-dependency-npm-{{ checksum "package.json" }}
       - v6-dependency-npm-
 
-  cache_npm_cache:
-    &cache_npm_cache
+  cache_npm_cache: &cache_npm_cache
     save_cache:
       key: v3-dependency-npm-{{ checksum "package.json" }}-{{ epoch }}
       paths:
         - ./node_modules/
 
-  restore_npm_cache:
-    &restore_npm_cache
+  restore_npm_cache: &restore_npm_cache
     restore_cache:
       <<: *npm_cache_keys
 
-  filters_only_main:
-    &filters_only_main
+  filters_only_main: &filters_only_main
     branches:
       only: main
 
-  filters_ignore_main:
-    &filters_ignore_main
+  filters_ignore_main: &filters_ignore_main
     branches:
       ignore: main
 
-  filters_ignore_tags:
-    &filters_ignore_tags
+  filters_ignore_tags: &filters_ignore_tags
     tags:
       ignore: /.*/
 
-  filters_version_tag:
-    &filters_version_tag
+  filters_version_tag: &filters_version_tag
     tags:
       only:
         - /^v?\d+\.\d+\.\d+(?:-beta\.\d+)?$/
@@ -76,11 +67,9 @@ jobs:
       - run:
           name: Checkout next-ci-shared-helpers
           command: git clone --depth 1
-            git@github.com:Financial-Times/next-ci-shared-helpers.git
-            .circleci/shared-helpers
+            git@github.com:Financial-Times/next-ci-shared-helpers.git --branch
+            unpin-heroku .circleci/shared-helpers
       - *restore_npm_cache
-      - node/install-npm:
-          version: "7.20.2"
       - run:
           name: Install project dependencies
           command: make install
@@ -143,14 +132,14 @@ workflows:
           name: build-v<< matrix.node-version >>
           matrix:
             parameters:
-              node-version: [ "16.14", "18.16" ]
+              node-version: [ "16.20", "18.16" ]
       - test:
           requires:
             - build-v<< matrix.node-version >>
           name: test-v<< matrix.node-version >>
           matrix:
             parameters:
-              node-version: [ "16.14", "18.16" ]
+              node-version: [ "16.20", "18.16" ]
 
   build-test-publish:
     when:
@@ -165,7 +154,7 @@ workflows:
           name: build-v<< matrix.node-version >>
           matrix:
             parameters:
-              node-version: [ "16.14", "18.16" ]
+              node-version: [ "16.20", "18.16" ]
       - test:
           filters:
             <<: *filters_version_tag
@@ -174,13 +163,13 @@ workflows:
           name: test-v<< matrix.node-version >>
           matrix:
             parameters:
-              node-version: [ "16.14", "18.16" ]
+              node-version: [ "16.20", "18.16" ]
       - publish:
           context: npm-publish-token
           filters:
             <<: *filters_version_tag
           requires:
-            - test-v16.14
+            - test-v18.16
 
   nightly:
     when:
@@ -197,7 +186,7 @@ workflows:
           name: build-v<< matrix.node-version >>
           matrix:
             parameters:
-              node-version: [ "16.14", "18.16" ]
+              node-version: [ "16.20", "18.16" ]
       - test:
           requires:
             - build-v<< matrix.node-version >>
@@ -205,4 +194,4 @@ workflows:
           name: test-v<< matrix.node-version >>
           matrix:
             parameters:
-              node-version: [ "16.14", "18.16" ]
+              node-version: [ "16.20", "18.16" ]
diff --git a/package-lock.json b/package-lock.json
index d170126..2da81e5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7,7 +7,6 @@
     "": {
       "name": "@financial-times/n-test",
       "version": "0.0.0",
-      "hasInstallScript": true,
       "license": "ISC",
       "dependencies": {
         "chalk": "^2.3.0",
diff --git a/package.json b/package.json
index e0fb917..6990f2b 100644
--- a/package.json
+++ b/package.json
@@ -8,8 +8,7 @@
   },
   "scripts": {
     "test": "make test",
-    "prepare": "npx snyk protect || npx snyk protect -d || true",
-    "preinstall": "[ \"$INIT_CWD\" != \"$PWD\" ] || npm_config_yes=true npx check-engine"
+    "prepare": "npx snyk protect || npx snyk protect -d || true"
   },
   "repository": {
     "type": "git",