diff --git a/__tests__/spec/migrate.js b/__tests__/spec/migrate.js
index 0ce15f1da1..06bfbc5db7 100644
--- a/__tests__/spec/migrate.js
+++ b/__tests__/spec/migrate.js
@@ -72,7 +72,7 @@ describe('migrate test prototype', () => {
     ])
 
     expect(scripts).toEqual({
-      dev: 'govuk-prototype-kit dev',
+      dev: 'govuk-prototype-kit dev || npm install && govuk-prototype-kit dev',
       serve: 'govuk-prototype-kit serve',
       start: 'govuk-prototype-kit start'
     })
diff --git a/bin/cli b/bin/cli
index f1e82d0784..7dcad950f4 100755
--- a/bin/cli
+++ b/bin/cli
@@ -57,7 +57,7 @@ usage-data-config.json
 
 const packageJson = {
   scripts: {
-    dev: 'govuk-prototype-kit dev',
+    dev: 'govuk-prototype-kit dev || npm install && govuk-prototype-kit dev',
     serve: 'govuk-prototype-kit serve',
     start: 'govuk-prototype-kit start'
   }