diff --git a/nix/t1/dependencies/_sources/generated.json b/nix/t1/dependencies/_sources/generated.json
index 9b782e4b1..1bd476231 100644
--- a/nix/t1/dependencies/_sources/generated.json
+++ b/nix/t1/dependencies/_sources/generated.json
@@ -41,7 +41,7 @@
     },
     "chisel": {
         "cargoLocks": null,
-        "date": "2024-12-12",
+        "date": "2024-12-14",
         "extract": null,
         "name": "chisel",
         "passthru": null,
@@ -53,11 +53,11 @@
             "name": null,
             "owner": "chipsalliance",
             "repo": "chisel",
-            "rev": "33b6b2dc9c50b4db44f647df16297dc8461207bb",
-            "sha256": "sha256-RR5l7SaqaXRB7ox2XA+goQJtnywbGEEBTMTjCoSfTAc=",
+            "rev": "901517953a9d01d2e570f6135ea54ee3abea382b",
+            "sha256": "sha256-nJyBE/6IzEDGvvK8xK8HXWykDYkmX9pjS9apYHlW5PQ=",
             "type": "github"
         },
-        "version": "33b6b2dc9c50b4db44f647df16297dc8461207bb"
+        "version": "901517953a9d01d2e570f6135ea54ee3abea382b"
     },
     "chisel-interface": {
         "cargoLocks": null,
@@ -119,4 +119,4 @@
         },
         "version": "6f22826d2c8facb6bf0b41f4bea26a2225751220"
     }
-}
+}
\ No newline at end of file
diff --git a/nix/t1/dependencies/_sources/generated.nix b/nix/t1/dependencies/_sources/generated.nix
index 1cde8e55c..059918e7b 100644
--- a/nix/t1/dependencies/_sources/generated.nix
+++ b/nix/t1/dependencies/_sources/generated.nix
@@ -27,15 +27,15 @@
   };
   chisel = {
     pname = "chisel";
-    version = "33b6b2dc9c50b4db44f647df16297dc8461207bb";
+    version = "901517953a9d01d2e570f6135ea54ee3abea382b";
     src = fetchFromGitHub {
       owner = "chipsalliance";
       repo = "chisel";
-      rev = "33b6b2dc9c50b4db44f647df16297dc8461207bb";
+      rev = "901517953a9d01d2e570f6135ea54ee3abea382b";
       fetchSubmodules = false;
-      sha256 = "sha256-RR5l7SaqaXRB7ox2XA+goQJtnywbGEEBTMTjCoSfTAc=";
+      sha256 = "sha256-nJyBE/6IzEDGvvK8xK8HXWykDYkmX9pjS9apYHlW5PQ=";
     };
-    date = "2024-12-12";
+    date = "2024-12-14";
   };
   chisel-interface = {
     pname = "chisel-interface";