diff --git a/nix/t1/dependencies/_sources/generated.json b/nix/t1/dependencies/_sources/generated.json
index bcb0d15c4..18156f5d4 100644
--- a/nix/t1/dependencies/_sources/generated.json
+++ b/nix/t1/dependencies/_sources/generated.json
@@ -41,7 +41,7 @@
     },
     "chisel": {
         "cargoLocks": null,
-        "date": "2024-12-05",
+        "date": "2024-12-07",
         "extract": null,
         "name": "chisel",
         "passthru": null,
@@ -53,11 +53,11 @@
             "name": null,
             "owner": "chipsalliance",
             "repo": "chisel",
-            "rev": "429cc7a227ecb6e7d30842d14228c41284c6b4af",
-            "sha256": "sha256-4JzEn7avsA4RUtWpb55OAx6A28jTtdRRNxHe6VEaeNs=",
+            "rev": "5871a65195c7ad96edb9c58dd94cddd942815dfb",
+            "sha256": "sha256-0xh7Xg2vi+GmoTQHNFJPQ5MP7r1UDmiGcJUI45YE16A=",
             "type": "github"
         },
-        "version": "429cc7a227ecb6e7d30842d14228c41284c6b4af"
+        "version": "5871a65195c7ad96edb9c58dd94cddd942815dfb"
     },
     "chisel-interface": {
         "cargoLocks": null,
diff --git a/nix/t1/dependencies/_sources/generated.nix b/nix/t1/dependencies/_sources/generated.nix
index 87e564bc8..221ea4452 100644
--- a/nix/t1/dependencies/_sources/generated.nix
+++ b/nix/t1/dependencies/_sources/generated.nix
@@ -27,15 +27,15 @@
   };
   chisel = {
     pname = "chisel";
-    version = "429cc7a227ecb6e7d30842d14228c41284c6b4af";
+    version = "5871a65195c7ad96edb9c58dd94cddd942815dfb";
     src = fetchFromGitHub {
       owner = "chipsalliance";
       repo = "chisel";
-      rev = "429cc7a227ecb6e7d30842d14228c41284c6b4af";
+      rev = "5871a65195c7ad96edb9c58dd94cddd942815dfb";
       fetchSubmodules = false;
-      sha256 = "sha256-4JzEn7avsA4RUtWpb55OAx6A28jTtdRRNxHe6VEaeNs=";
+      sha256 = "sha256-0xh7Xg2vi+GmoTQHNFJPQ5MP7r1UDmiGcJUI45YE16A=";
     };
-    date = "2024-12-05";
+    date = "2024-12-07";
   };
   chisel-interface = {
     pname = "chisel-interface";