diff --git a/packages/config/package.json b/packages/config/package.json
index 14b860bef1..7d0ceea4d1 100644
--- a/packages/config/package.json
+++ b/packages/config/package.json
@@ -11,7 +11,8 @@
   },
   "files": [
     "bin.js",
-    "lib/**/*.js"
+    "lib/**/*.js",
+    "lib/**/*.d.ts"
   ],
   "author": "Netlify Inc.",
   "contributors": [
diff --git a/packages/config/src/mutations/apply.js b/packages/config/src/mutations/apply.js
index 612e6087c1..de885298df 100644
--- a/packages/config/src/mutations/apply.js
+++ b/packages/config/src/mutations/apply.js
@@ -77,4 +77,7 @@ const MUTABLE_PROPS = {
   images: { lastEvent: 'onPostBuild' },
   'images.remote_images': { lastEvent: 'onPostBuild' },
   redirects: { lastEvent: 'onPostBuild' },
+  'dev.processing': { lastEvent: 'onPreDev' },
+  'dev.processing.html': { lastEvent: 'onPreDev' },
+  'dev.processing.html.injections': { lastEvent: 'onPreDev' },
 }