diff --git a/renderer/html/html.go b/renderer/html/html.go
index 6359a20..60451df 100644
--- a/renderer/html/html.go
+++ b/renderer/html/html.go
@@ -201,10 +201,8 @@ var GlobalAttributeFilter = util.NewBytesFilter(
 	[]byte("autofocus"),
 	[]byte("class"),
 	[]byte("contenteditable"),
-	[]byte("contextmenu"),
 	[]byte("dir"),
 	[]byte("draggable"),
-	[]byte("dropzone"),
 	[]byte("enterkeyhint"),
 	[]byte("hidden"),
 	[]byte("id"),