diff --git a/themes/hugo-serif-theme b/themes/hugo-serif-theme
index ba4d04557..40243e6ce 160000
--- a/themes/hugo-serif-theme
+++ b/themes/hugo-serif-theme
@@ -1 +1 @@
-Subproject commit ba4d04557dc975ad34a4acbff3f23287b0339122
+Subproject commit 40243e6ce45218ab49001036c340445a84630e42