diff --git a/extmod/ulab b/extmod/ulab
index 66b89de8c7..a91b36986d 160000
--- a/extmod/ulab
+++ b/extmod/ulab
@@ -1 +1 @@
-Subproject commit 66b89de8c714790de8647dc55f59430002044171
+Subproject commit a91b36986d81fd906a6232010778f2a93d690f8e