diff --git a/hmm.json b/hmm.json
index a75dee432..0dfe88ded 100644
--- a/hmm.json
+++ b/hmm.json
@@ -146,7 +146,7 @@
       "name": "polymod",
       "type": "git",
       "dir": null,
-      "ref": "5547763a22858a1f10939e082de421d587c862bf",
+      "ref": "8553b800965f225bb14c7ab8f04bfa9cdec362ac",
       "url": "https://github.com/larsiusprime/polymod"
     },
     {