diff --git a/src/web_accessible_resources/to-import.txt b/src/web_accessible_resources/to-import.txt
index 969b2efdf..ca3df4f3d 100644
--- a/src/web_accessible_resources/to-import.txt
+++ b/src/web_accessible_resources/to-import.txt
@@ -46,6 +46,7 @@ ligatus.com/*/angular-tag.js
 noopframe
 noopjs
 noopmp3-0.1s
+noopmp4-1s
 nooptext
 popads-dummy.js
 popads.net.js