diff --git a/vlsi/hammer b/vlsi/hammer
index 56739c32..da9c84f3 160000
--- a/vlsi/hammer
+++ b/vlsi/hammer
@@ -1 +1 @@
-Subproject commit 56739c32a81c82bdb065613cc3aa878f1ca40d4c
+Subproject commit da9c84f35c1b2df0feaba11395ba4e4570ab5b67