diff --git a/ponyracer/.gitignore b/ponyracer/.gitignore
index 86d943a..de51f68 100644
--- a/ponyracer/.gitignore
+++ b/ponyracer/.gitignore
@@ -12,7 +12,6 @@
 
 # profiling files
 chrome-profiler-events*.json
-speed-measure-plugin*.json
 
 # IDEs and editors
 /.idea
diff --git a/ponyracer/README.md b/ponyracer/README.md
index c09e751..d432611 100644
--- a/ponyracer/README.md
+++ b/ponyracer/README.md
@@ -1,6 +1,6 @@
 # Ponyracer
 
-This project was generated with [Angular CLI](https://github.com/angular/angular-cli) version 12.0.0-next.3.
+This project was generated with [Angular CLI](https://github.com/angular/angular-cli) version 12.0.0-next.4.
 
 ## Development server
 
diff --git a/ponyracer/angular.json b/ponyracer/angular.json
index 625bd0b..c9da190 100644
--- a/ponyracer/angular.json
+++ b/ponyracer/angular.json
@@ -12,14 +12,17 @@
         "build": {
           "builder": "@angular-devkit/build-angular:ng-packagr",
           "options": {
-            "tsConfig": "projects/ponyracer-lib/tsconfig.lib.json",
             "project": "projects/ponyracer-lib/ng-package.json"
           },
           "configurations": {
             "production": {
               "tsConfig": "projects/ponyracer-lib/tsconfig.lib.prod.json"
+            },
+            "development": {
+              "tsConfig": "projects/ponyracer-lib/tsconfig.lib.json"
             }
-          }
+          },
+          "defaultConfiguration": "production"
         },
         "test": {
           "builder": "@angular-devkit/build-angular:karma",
diff --git a/ponyracer/package.json b/ponyracer/package.json
index 32e5f53..c18ac2a 100644
--- a/ponyracer/package.json
+++ b/ponyracer/package.json
@@ -5,27 +5,28 @@
     "ng": "ng",
     "start": "ng serve",
     "build": "ng build",
+    "watch": "ng build --watch --configuration development",
     "test": "ng test",
     "lint": "ng lint"
   },
   "private": true,
   "dependencies": {
-    "@angular/animations": "~12.0.0-next.3",
-    "@angular/common": "~12.0.0-next.3",
-    "@angular/compiler": "~12.0.0-next.3",
-    "@angular/core": "~12.0.0-next.3",
-    "@angular/forms": "~12.0.0-next.3",
-    "@angular/platform-browser": "~12.0.0-next.3",
-    "@angular/platform-browser-dynamic": "~12.0.0-next.3",
-    "@angular/router": "~12.0.0-next.3",
+    "@angular/animations": "~12.0.0-next.4",
+    "@angular/common": "~12.0.0-next.4",
+    "@angular/compiler": "~12.0.0-next.4",
+    "@angular/core": "~12.0.0-next.4",
+    "@angular/forms": "~12.0.0-next.4",
+    "@angular/platform-browser": "~12.0.0-next.4",
+    "@angular/platform-browser-dynamic": "~12.0.0-next.4",
+    "@angular/router": "~12.0.0-next.4",
     "rxjs": "~6.6.0",
     "tslib": "^2.0.0",
     "zone.js": "~0.11.4"
   },
   "devDependencies": {
     "@angular-devkit/build-angular": "~0.1200.0-next.3",
-    "@angular/cli": "~12.0.0-next.3",
-    "@angular/compiler-cli": "~12.0.0-next.3",
+    "@angular/cli": "~12.0.0-next.4",
+    "@angular/compiler-cli": "~12.0.0-next.4",
     "@types/jasmine": "~3.6.0",
     "@types/node": "^12.11.1",
     "codelyzer": "^6.0.0",
diff --git a/ponyracer/projects/ponyracer-lib/README.md b/ponyracer/projects/ponyracer-lib/README.md
index 00bb038..79463e7 100644
--- a/ponyracer/projects/ponyracer-lib/README.md
+++ b/ponyracer/projects/ponyracer-lib/README.md
@@ -1,6 +1,6 @@
 # PonyracerLib
 
-This library was generated with [Angular CLI](https://github.com/angular/angular-cli) version 12.0.0-next.3.
+This library was generated with [Angular CLI](https://github.com/angular/angular-cli) version 12.0.0-next.4.
 
 ## Code scaffolding
 
diff --git a/ponyracer/projects/ponyracer-lib/package.json b/ponyracer/projects/ponyracer-lib/package.json
index 63ba6ea..ba62079 100644
--- a/ponyracer/projects/ponyracer-lib/package.json
+++ b/ponyracer/projects/ponyracer-lib/package.json
@@ -2,8 +2,8 @@
   "name": "ponyracer-lib",
   "version": "0.0.1",
   "peerDependencies": {
-    "@angular/common": "^12.0.0-next.3",
-    "@angular/core": "^12.0.0-next.3"
+    "@angular/common": "^12.0.0-next.4",
+    "@angular/core": "^12.0.0-next.4"
   },
   "dependencies": {
     "tslib": "^2.0.0"