diff --git a/library.json b/library.json
index 431253b..645e854 100644
--- a/library.json
+++ b/library.json
@@ -4,6 +4,9 @@
   "majorVersion": 1,
   "minorVersion": 1,
   "patchVersion": 0,
+  "embedTypes": [
+    "iframe"
+  ],
   "runnable": 1,
   "fullscreen": 0,
   "machineName": "H5P.QuestionSet",