diff --git a/flake.lock b/flake.lock
index ac04375a0b..5466b6625e 100644
--- a/flake.lock
+++ b/flake.lock
@@ -65,16 +65,16 @@
         "z3": "z3"
       },
       "locked": {
-        "lastModified": 1731544264,
-        "narHash": "sha256-xNOWDCpJnapf8DgvzKHSe+xA8P/RuwBBrQKzVbY7phc=",
+        "lastModified": 1731858864,
+        "narHash": "sha256-P5lwiVFy3qVKe08TYOLc+nBss3AsM+nBIspw5nP1frY=",
         "owner": "runtimeverification",
         "repo": "haskell-backend",
-        "rev": "5a2777d8c6681ef10f5e05aa52103d63e23e451a",
+        "rev": "820cd05c084ba7f297e74a960f98e99ea2b2fba4",
         "type": "github"
       },
       "original": {
         "owner": "runtimeverification",
-        "ref": "v0.1.98",
+        "ref": "v0.1.99",
         "repo": "haskell-backend",
         "type": "github"
       }