diff --git a/manifest.json b/manifest.json
index c362c735..01129353 100644
--- a/manifest.json
+++ b/manifest.json
@@ -36,6 +36,7 @@
       "background/db.js",
       "background/style-manager.js",
       "background/navigator-util.js",
+      "background/icon-util.js",
       "background/background.js",
       "background/usercss-helper.js",
       "background/style-via-api.js",