diff --git a/hmm.json b/hmm.json
index 0d66fb703..b62ec3cb9 100644
--- a/hmm.json
+++ b/hmm.json
@@ -94,7 +94,7 @@
             "name": "polymod",
             "type": "git",
             "dir": null,
-            "ref": "547c8ee",
+            "ref": "4e5b4b3",
             "url": "https://github.com/larsiusprime/polymod"
         },
         {