diff --git a/hmm.json b/hmm.json
index d297a2680..f098a80e9 100644
--- a/hmm.json
+++ b/hmm.json
@@ -219,7 +219,7 @@
       "name": "polymod",
       "type": "git",
       "dir": null,
-      "ref": "23a27ec2458aff5dae44de5a383236e2bd4b644a",
+      "ref": "b85ef965d52bb963d8368c46f498562820fc5d81",
       "url": "https://github.com/larsiusprime/polymod"
     },
     {