diff --git a/content/core/013.md b/content/core/013.md
index ec69174..575e614 100644
--- a/content/core/013.md
+++ b/content/core/013.md
@@ -7,7 +7,7 @@ I won't repost them, because they're direct logs, shortly after the conversation
 
 > It's surreal, even for me, to hear you talk about this today, given your current situation.
 
-<iframe src="http://polycul.es/embed/36a668e676628088cf66e3d2a3985e010e28679a" width="980" height="520" style="border:0;"></iframe>
+<iframe src="https://polycul.es/embed/36a668e676628088cf66e3d2a3985e010e28679a" width="980" height="520" style="border:0;"></iframe>
 
 Suppose that the young man, Matthew, is in a monogamous relationship with someone. As the years go by the relationship begins to change, fades, and is replaced by a new one, more open than the last. After a decade or so, all of the parts have been replaced and Matthew, now Madison, is in a polycule the size of Rhode Island. Is Madison still the same person as Matthew?