diff --git a/vendor/nim-ssz-serialization b/vendor/nim-ssz-serialization
index 1236d8df8..9f6fc631e 160000
--- a/vendor/nim-ssz-serialization
+++ b/vendor/nim-ssz-serialization
@@ -1 +1 @@
-Subproject commit 1236d8df8f69b8b1cf86e5e6030dbcb3d65872f6
+Subproject commit 9f6fc631e24bb49e6afa2bdd708e6efc840d240c