diff --git a/book/external/sphinx-iframes b/book/external/sphinx-iframes
index 89f544c..583163e 160000
--- a/book/external/sphinx-iframes
+++ b/book/external/sphinx-iframes
@@ -1 +1 @@
-Subproject commit 89f544c46ca36b9e57e3f0b724fcc81667c083bf
+Subproject commit 583163ebf970a83ff45d80bb9ace9922d1e1615b