diff --git a/shirakami b/shirakami
index d4db73a..6378741 160000
--- a/shirakami
+++ b/shirakami
@@ -1 +1 @@
-Subproject commit d4db73aaa3a1628a148004a7a6889d1a47ae779e
+Subproject commit 63787418a452dedd229b5f299f21cd670be31eea