diff --git a/book/external/sphinx-iframes b/book/external/sphinx-iframes
index 69e6028..d92bc03 160000
--- a/book/external/sphinx-iframes
+++ b/book/external/sphinx-iframes
@@ -1 +1 @@
-Subproject commit 69e6028e79a3e5aa521093155ee54201299630ff
+Subproject commit d92bc03af5f067453caf104a424e0cc0ebdbf04b