diff --git a/book/external/sphinx-iframes b/book/external/sphinx-iframes
index 95cbf15..5f946a1 160000
--- a/book/external/sphinx-iframes
+++ b/book/external/sphinx-iframes
@@ -1 +1 @@
-Subproject commit 95cbf15ea0729f57e38dce0523eff27f836a2771
+Subproject commit 5f946a1db9610aefc54681b1c262680d1575d965