diff --git a/lib/new-package.js b/lib/new-package.js
index e4c02c394..2ae5bb6ca 100644
--- a/lib/new-package.js
+++ b/lib/new-package.js
@@ -308,6 +308,7 @@ ElmjutsuDumMyM0DuL3.elm
   const licenseArgs = options.forTests ? '--name "Test User" --year 2020' : '';
   try {
     childProcess.execSync(
+      // TODO(@lishaduck): Evaluate calling the API instead.
       `npx license ${license} --projectName "${authorName}/${packageName}" ${licenseArgs}`,
       {
         cwd: dir,
@@ -445,6 +446,7 @@ elm-review --template ${authorName}/${packageName}/example
 function packageJson(options, packageName) {
   return {
     name: packageName,
+    private: true,
     scripts: {
       test: 'npm-run-all --print-name --silent --sequential test:make test:format test:run test:review test:package',
       'test:make': 'elm make --docs=docs.json',
@@ -459,11 +461,14 @@ function packageJson(options, packageName) {
       'update-examples': 'node maintenance/update-examples-from-preview.js',
       postinstall: 'elm-tooling install'
     },
-    dependencies: {
+    engines: {
+      node: '>=14.21.3'
+    },
+    devDependencies: {
       'elm-doc-preview': '^5.0.5',
       'elm-review': `^${options.packageJsonVersion}`,
-      'elm-test': '^0.19.1-revision10',
-      'elm-tooling': '^1.13.1',
+      'elm-test': '^0.19.1-revision12',
+      'elm-tooling': '^1.15.1',
       'fs-extra': '^9.0.0',
       glob: '^9.3.1',
       'npm-run-all': '^4.1.5'
diff --git a/test/run-snapshots/elm-review-something-for-new-rule/package.json b/test/run-snapshots/elm-review-something-for-new-rule/package.json
index f3024db52..2d3144daf 100644
--- a/test/run-snapshots/elm-review-something-for-new-rule/package.json
+++ b/test/run-snapshots/elm-review-something-for-new-rule/package.json
@@ -1,5 +1,6 @@
 {
   "name": "elm-review-something",
+  "private": true,
   "scripts": {
     "test": "npm-run-all --print-name --silent --sequential test:make test:format test:run test:review test:package",
     "test:make": "elm make --docs=docs.json",
@@ -13,11 +14,14 @@
     "update-examples": "node maintenance/update-examples-from-preview.js",
     "postinstall": "elm-tooling install"
   },
-  "dependencies": {
+  "engines": {
+    "node": ">=14.21.3"
+  },
+  "devDependencies": {
     "elm-doc-preview": "^5.0.5",
     "elm-review": "^2.12.0",
-    "elm-test": "^0.19.1-revision10",
-    "elm-tooling": "^1.13.1",
+    "elm-test": "^0.19.1-revision12",
+    "elm-tooling": "^1.15.1",
     "fs-extra": "^9.0.0",
     "glob": "^9.3.1",
     "npm-run-all": "^4.1.5"
diff --git a/test/run-snapshots/elm-review-something/package.json b/test/run-snapshots/elm-review-something/package.json
index f3024db52..2d3144daf 100644
--- a/test/run-snapshots/elm-review-something/package.json
+++ b/test/run-snapshots/elm-review-something/package.json
@@ -1,5 +1,6 @@
 {
   "name": "elm-review-something",
+  "private": true,
   "scripts": {
     "test": "npm-run-all --print-name --silent --sequential test:make test:format test:run test:review test:package",
     "test:make": "elm make --docs=docs.json",
@@ -13,11 +14,14 @@
     "update-examples": "node maintenance/update-examples-from-preview.js",
     "postinstall": "elm-tooling install"
   },
-  "dependencies": {
+  "engines": {
+    "node": ">=14.21.3"
+  },
+  "devDependencies": {
     "elm-doc-preview": "^5.0.5",
     "elm-review": "^2.12.0",
-    "elm-test": "^0.19.1-revision10",
-    "elm-tooling": "^1.13.1",
+    "elm-test": "^0.19.1-revision12",
+    "elm-tooling": "^1.15.1",
     "fs-extra": "^9.0.0",
     "glob": "^9.3.1",
     "npm-run-all": "^4.1.5"