diff --git a/README.md b/README.md
index 81cb97f57..a4c800111 100644
--- a/README.md
+++ b/README.md
@@ -86,6 +86,7 @@ Accent provides a default value for every required environment variable. This me
 | `SENTRY_DSN`           | _none_  | The *secret* Sentry DSN used to collect API runtime errors                                                                                                                                  |
 | `WEBAPP_SENTRY_DSN`    | _none_  | The *public* Sentry DSN used to collect Webapp runtime errors                                                                                                                               |
 | `GOOGLE_API_CLIENT_ID` | _none_  | When deploying in a `prod` environment, the Google login is the only way to authenticate user. In `dev` environment, a fake login provider is used so you don’t have to setup a Google app. |
+| `RESTRICTED_DOMAIN`    | _none_  | If specified, only authenticated users from this domain name will be able to create new projects. |
 
 ## Tests
 
diff --git a/app.json b/app.json
index 7625d78b3..9822a3c2d 100644
--- a/app.json
+++ b/app.json
@@ -14,6 +14,32 @@
   "scripts": {
     "postdeploy": "mix do ecto.migrate, run ./priv/repo/seeds.exs"
   },
+  "env": {
+    "API_HOST": {
+      "description": "The URL to which the Web application will connect for API requests",
+      "value": "https://this-heroku-app-name.herokuapp.com"
+    },
+    "API_WS_HOST": {
+      "description": "The URL to which the Web application will connect for Websocket sessions",
+      "value": "wss://this-heroku-app-name.herokuapp.com"
+    },
+    "FORCE_SSL": {
+      "description": "Whether to force HTTPS requests to the Web application and the API",
+      "value": "true"
+    },
+    "GOOGLE_API_CLIENT_ID": {
+      "description": "The Google API OAuth client ID that will be used to authenticate users. You can create a “Web application”-type credential at https://console.developers.google.com/apis/credentials",
+      "value": "google-api-client-id.apps.googleusercontent.com"
+    },
+    "MIX_ENV": {
+      "description": "The environment in which Elixir code will run",
+      "value": "prod"
+    },
+    "RESTRICTED_DOMAIN": {
+      "description": "If specified, only authenticated users from this domain name will be able to create projects",
+      "required": false
+    }
+  },
   "addons": [
     {
       "plan": "heroku-postgresql",