diff --git a/Extension/manifest.json b/Extension/manifest.json
index b395e3a..ab5bb58 100644
--- a/Extension/manifest.json
+++ b/Extension/manifest.json
@@ -6,8 +6,9 @@
   "icons": {
     "16": "icons/icon16.png",
     "32": "icons/icon32.png",
-    "48": "icons/icon48.png",
-    "128": "icons/icon128.png"
+    "64": "icons/icon64.png",
+    "128": "icons/icon128.png",
+    "256": "icons/icon256.png"
   },
   "permissions": [
     "activeTab",
@@ -22,8 +23,9 @@
     "default_icon": {
       "16": "icons/icon16.png",
       "32": "icons/icon32.png",
-      "48": "icons/icon48.png",
-      "128": "icons/icon128.png"
+      "64": "icons/icon64.png",
+      "128": "icons/icon128.png",
+      "256": "icons/icon256.png"
     }
   },
   "content_scripts": [
@@ -53,3 +55,4 @@
     }
   ]
 }
+