diff --git a/koreader-base b/koreader-base
index 9c1032db3..b31c920b4 160000
--- a/koreader-base
+++ b/koreader-base
@@ -1 +1 @@
-Subproject commit 9c1032db3643a891626587cfe813ea4cfabbf556
+Subproject commit b31c920b45427d92b7ad4977fd9644e9a9c0d185