diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4c3f10b..08889a3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # CHANGELOG
 
+## 3.1.0
+
+* Automatically enabled Stimulus's "debug" mode when doing a dev build. You will
+  now, while developing, see debugging information in your browser's console log!
+  See #65.
+
 ## 3.0.0
 
 Dropped support for `stimulus` 2.0, in favor of `@hotwired/stimulus` version 3.
@@ -7,8 +13,9 @@ You can read about Stimulus version on its [release announcement](https://world.
 
 The most important change needed is to:
 
-* Remove `stimulus` from your `package.json` file, replace it with `"@hotwired/stimulus": "^3.0"`
-  and run `yarn install`. Also upgrade `@symfony/webpack-encore` to 1.7.0 or later.
+* Remove `stimulus` from your `package.json` file and replace it with `"@hotwired/stimulus": "^3.0"`.
+  Also change your `@symfony/webpack-encore` version to `^1.7` and `@symfony/stimulus-bridge` to `^3.0`.
+  After making these changes, run `yarn install`.
 
 * Update all of your controllers to replace any imports for `stimulus` with
   imports from `@hotwired/stimulus`:
@@ -18,8 +25,8 @@ The most important change needed is to:
 +import { Controller } from '@hotwired/stimulus';
 ```
 
-* Upgrade any `symfony/ux-*` PHP packages that you have installed to version 2 or later. Then
-  run `yarn install --force`.
+* In `composer.json`, update any `symfony/ux-*` packages that you have installed to version `^2.0`.
+  Run `composer up "symfony/ux-*"`. Once that finishes, run `yarn install --force`.
 
 ## 2.0.0
 
diff --git a/README.md b/README.md
index 496c47b..55ab79a 100644
--- a/README.md
+++ b/README.md
@@ -267,6 +267,34 @@ application.register('autocomplete', Autocomplete)
 export { app };
 ```
 
+## Writing TypeScript controllers
+
+If you want to write TypeScript controllers, make sure the target of your TypeScript config is set to `ES6`:
+
+```json
+{
+    "compilerOptions": {
+        //...
+        "target": "ES6",
+    },
+    //...
+}
+```
+
+If you don't you may face the following issue in your browser console when the controller is called:
+
+```
+# Error thrown in Chrome console:
+Uncaught (in promise) TypeError: Class constructor Controller cannot be invoked without 'new'
+
+# Error thrown in Firefox console:
+Uncaught (in promise) TypeError: class constructors must be invoked with 'new'
+```
+
+The error is caused when an ES5 class tries to "extend" an ES6 class. If the target is not correctly set, 
+TypeScript will transpile the controller to old ES5 code. But Stimulus 3 uses pure ES6 classes. 
+This causes an incompatibility, hence the need to target ES6 explicitly.
+
 ## Run tests
 
 ```sh
diff --git a/dist/index.js b/dist/index.js
index 2cca8c8..5ee09e8 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -31,6 +31,9 @@ function identifierForContextKey(key) {
 
 function startStimulusApp(context) {
     const application = Application.start();
+    if (process.env.NODE_ENV === 'development') {
+        application.debug = true;
+    }
     if (context) {
         application.load(definitionsFromContext(context));
     }
diff --git a/package.json b/package.json
index ee612a5..371f408 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@symfony/stimulus-bridge",
     "description": "Stimulus integration bridge for Symfony projects",
-    "version": "3.0.0",
+    "version": "3.1.0",
     "main": "dist/index.js",
     "license": "MIT",
     "author": "Titouan Galopin <galopintitouan@gmail.com>",
diff --git a/src/index.ts b/src/index.ts
index 53b40b4..3d3b0eb 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -20,6 +20,10 @@ import symfonyControllers from './webpack/loader!@symfony/stimulus-bridge/contro
 export function startStimulusApp(context: any) {
     const application = Application.start();
 
+    if (process.env.NODE_ENV === 'development') {
+        application.debug = true;
+    }
+
     if (context) {
         application.load(definitionsFromContext(context));
     }