diff --git a/nix/t1/dependencies/_sources/generated.json b/nix/t1/dependencies/_sources/generated.json
index ddf8e4ed2..ee6c85c5f 100644
--- a/nix/t1/dependencies/_sources/generated.json
+++ b/nix/t1/dependencies/_sources/generated.json
@@ -53,11 +53,11 @@
             "name": null,
             "owner": "chipsalliance",
             "repo": "chisel",
-            "rev": "d564445dbcd81c6ac3319ef9442db2d177ae124f",
-            "sha256": "sha256-V8CxQ5VIkk2c+7KlQIcQX6Qe2PbMZI7/q+5e4iDXajI=",
+            "rev": "426d048ca73ee506092e5b32bd968e24a98cdcfe",
+            "sha256": "sha256-AVbD5DFsbOzhPhQkoelAxdhJG3MjFCGhpOunlJqmi30=",
             "type": "github"
         },
-        "version": "d564445dbcd81c6ac3319ef9442db2d177ae124f"
+        "version": "426d048ca73ee506092e5b32bd968e24a98cdcfe"
     },
     "chisel-interface": {
         "cargoLocks": null,
diff --git a/nix/t1/dependencies/_sources/generated.nix b/nix/t1/dependencies/_sources/generated.nix
index aa411b29d..f3df8c51c 100644
--- a/nix/t1/dependencies/_sources/generated.nix
+++ b/nix/t1/dependencies/_sources/generated.nix
@@ -27,13 +27,13 @@
   };
   chisel = {
     pname = "chisel";
-    version = "d564445dbcd81c6ac3319ef9442db2d177ae124f";
+    version = "426d048ca73ee506092e5b32bd968e24a98cdcfe";
     src = fetchFromGitHub {
       owner = "chipsalliance";
       repo = "chisel";
-      rev = "d564445dbcd81c6ac3319ef9442db2d177ae124f";
+      rev = "426d048ca73ee506092e5b32bd968e24a98cdcfe";
       fetchSubmodules = false;
-      sha256 = "sha256-V8CxQ5VIkk2c+7KlQIcQX6Qe2PbMZI7/q+5e4iDXajI=";
+      sha256 = "sha256-AVbD5DFsbOzhPhQkoelAxdhJG3MjFCGhpOunlJqmi30=";
     };
     date = "2024-10-16";
   };