diff --git a/README.md b/README.md
index 7c9b9ee7..0ae36f1d 100644
--- a/README.md
+++ b/README.md
@@ -124,6 +124,22 @@ setTheme('default')
 setTheme('primary')
 ```
 
+Development mode
+----------
+
+In order to add new features to the cozy-bar v7 while working on another cozy-app:
+
+* Please ensure your app has the latest v7-stable `cozy-bar` version
+
+* Please ensure your app has at least the 6.3.4 `cozy-scripts` version
+
+* Then, follow these steps:
+
+`$ yarn link` // in cozy-bar
+`$ rlink cozy-bar` // in the cozy-app
+`$ yarn start` // in cozy-bar
+`$ yarn start` // in the cozy-app
+
 Contribute
 ----------
 
diff --git a/package.json b/package.json
index 4b152127..1302a799 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,8 @@
     "posttest": "bundlesize",
     "travis-deploy-once": "travis-deploy-once",
     "semantic-release": "semantic-release",
-    "example": "env USE_REACT=true nf -j examples/Procfile start"
+    "example": "env USE_REACT=true nf -j examples/Procfile start",
+    "start": "yarn watch"
   },
   "devDependencies": {
     "@babel/core": "7.6.2",