diff --git a/chromesoul.js b/chromesoul.js
index 85dc9f3..55f4bf1 100644
--- a/chromesoul.js
+++ b/chromesoul.js
@@ -14,9 +14,9 @@
 // OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 //
 
-chrome.app.runtime.onLaunched.addListener(function(intentData) {
-    //if (window.chrome && window.chrome.app && window.chrome.app.isInstalled) {
-    if (window.chrome && window.chrome.app) {
-	window.open("chromesoul.html#0", "bg", "background");
-    }
+chrome.app.runtime.onLaunched.addListener(function() {
+  chrome.app.window.create('chromesoul.html', {
+    'width': 400,
+    'height': 500
+  });
 });
diff --git a/manifest.json b/manifest.json
index c937d2b..5f08c57 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,6 +1,6 @@
 {
     "name": "Chromesoul",
-    "version": "0.4.7",
+    "version": "0.4.9",
     "minimum_chrome_version": "24",
     "manifest_version": 2,
     "offline_enabled": false,
@@ -16,7 +16,6 @@
     },
     "permissions": [
 	"http://www.epitech.eu/intra/photos/",
-	"background",
 	"storage",
 	"notifications",
 	{"socket": ["tcp-connect:ns-server.epita.fr:4242"]}