diff --git a/package.json b/package.json
index d10ae587..847c3db4 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "scripts": {
     "ng": "ng",
-    "start": "ng serve --port 4201",
+    "start": "ng serve --port 4201 -c development",
     "build": "ng build",
     "test": "ng test",
     "lint": "ng lint",
diff --git a/tsconfig.json b/tsconfig.json
index d968f1f7..3088fa87 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -19,7 +19,7 @@
     "module": "es2020",
     "allowJs": true,
     "lib": [
-      "es2018",
+      "es2020",
       "dom"
     ],
     "types": [],