diff --git a/book/external/Sphinx-Image-Inverter b/book/external/Sphinx-Image-Inverter
index 61f101b..fe20415 160000
--- a/book/external/Sphinx-Image-Inverter
+++ b/book/external/Sphinx-Image-Inverter
@@ -1 +1 @@
-Subproject commit 61f101bd1fcf9bd8d2990e72b86e38499e0f3f04
+Subproject commit fe204154a4ba19a59ae5a657cb52368b939ae3a4