diff --git a/book/external/sphinx-iframes b/book/external/sphinx-iframes
index d92bc03..b0fcde7 160000
--- a/book/external/sphinx-iframes
+++ b/book/external/sphinx-iframes
@@ -1 +1 @@
-Subproject commit d92bc03af5f067453caf104a424e0cc0ebdbf04b
+Subproject commit b0fcde7e8957babcbda79bf861f6c2e2885c0df4