diff --git a/package-lock.json b/package-lock.json
index 3d4d10ae6..bcbece662 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7,6 +7,7 @@
     "": {
       "name": "@microbit/python-editor-v3",
       "version": "3.0.0-local",
+      "hasInstallScript": true,
       "license": "MIT",
       "dependencies": {
         "@chakra-ui/icons": "^2.1.1",
diff --git a/package.json b/package.json
index 98bf57d74..3bc596920 100644
--- a/package.json
+++ b/package.json
@@ -78,7 +78,8 @@
   "scripts": {
     "bundle-size-explorer": "source-map-explorer 'build/static/js/*.js'",
     "bundle-size-report": "source-map-explorer 'build/static/js/*.js' --html reports/bundle-size.html",
-    "ci": "npm run theme && npm run typecheck && npm run test && npm run build && npm run bundle-size-report",
+    "ci": "npm run typecheck && npm run test && npm run build && npm run bundle-size-report",
+    "postinstall": "npm run theme",
     "start": "craco start",
     "build": "craco build",
     "test": "craco test --testPathIgnorePatterns=e2e",