diff --git a/nix/t1/dependencies/_sources/generated.json b/nix/t1/dependencies/_sources/generated.json
index 4388b27b3..92b863d88 100644
--- a/nix/t1/dependencies/_sources/generated.json
+++ b/nix/t1/dependencies/_sources/generated.json
@@ -41,7 +41,7 @@
     },
     "chisel": {
         "cargoLocks": null,
-        "date": "2024-12-08",
+        "date": "2024-12-12",
         "extract": null,
         "name": "chisel",
         "passthru": null,
@@ -53,11 +53,11 @@
             "name": null,
             "owner": "chipsalliance",
             "repo": "chisel",
-            "rev": "a6196ca5b4ed2e5487d8be4507cc96516b5b3c8f",
-            "sha256": "sha256-s6y4jlTvh4q6mWXCGzxxUtFaekZ9BDT9FhrSqvtWnwE=",
+            "rev": "d47ed9bd39e16d07676f7a5a28c396b23fcbd6a4",
+            "sha256": "sha256-KuK+qKw6gonrnpsczkk1KE+jWfppyVU0UKghv0teQJo=",
             "type": "github"
         },
-        "version": "a6196ca5b4ed2e5487d8be4507cc96516b5b3c8f"
+        "version": "d47ed9bd39e16d07676f7a5a28c396b23fcbd6a4"
     },
     "chisel-interface": {
         "cargoLocks": null,
diff --git a/nix/t1/dependencies/_sources/generated.nix b/nix/t1/dependencies/_sources/generated.nix
index 79d0bce15..3dc3ee7f9 100644
--- a/nix/t1/dependencies/_sources/generated.nix
+++ b/nix/t1/dependencies/_sources/generated.nix
@@ -27,15 +27,15 @@
   };
   chisel = {
     pname = "chisel";
-    version = "a6196ca5b4ed2e5487d8be4507cc96516b5b3c8f";
+    version = "d47ed9bd39e16d07676f7a5a28c396b23fcbd6a4";
     src = fetchFromGitHub {
       owner = "chipsalliance";
       repo = "chisel";
-      rev = "a6196ca5b4ed2e5487d8be4507cc96516b5b3c8f";
+      rev = "d47ed9bd39e16d07676f7a5a28c396b23fcbd6a4";
       fetchSubmodules = false;
-      sha256 = "sha256-s6y4jlTvh4q6mWXCGzxxUtFaekZ9BDT9FhrSqvtWnwE=";
+      sha256 = "sha256-KuK+qKw6gonrnpsczkk1KE+jWfppyVU0UKghv0teQJo=";
     };
-    date = "2024-12-08";
+    date = "2024-12-12";
   };
   chisel-interface = {
     pname = "chisel-interface";