diff --git a/manifest.json b/manifest.json
index d43df2c..2ff6b74 100644
--- a/manifest.json
+++ b/manifest.json
@@ -45,5 +45,8 @@
   ],
   "host_permissions": [
     "*://*/*"
-  ]
+  ],
+  "content_security_policy": {
+    "extension_pages": "script-src 'self'; object-src 'none'; connect-src 'self' http: https:"
+  }
 }