diff --git a/flake.lock b/flake.lock
index 7f5a4bd..4c7869f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -22,11 +22,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1720022903,
-        "narHash": "sha256-TLiEulaY4I+vwaJIHQXASVQva+2nepaziUomigYY9+0=",
+        "lastModified": 1720459846,
+        "narHash": "sha256-3gf8pkyp/yjFdLJo7PSQ/Vmta9QBPWfKs5SFc/wh3h4=",
         "owner": "Nixos",
         "repo": "nixpkgs",
-        "rev": "88f3dab52d2cc42945f70f4e84c4505dedaa377d",
+        "rev": "c030874db3ce4ff192aabf059988ed1be95d167a",
         "type": "github"
       },
       "original": {
@@ -50,11 +50,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1719887753,
-        "narHash": "sha256-p0B2r98UtZzRDM5miGRafL4h7TwGRC4DII+XXHDHqek=",
+        "lastModified": 1720436211,
+        "narHash": "sha256-/cKXod0oGLl+vH4bKBZnTV3qxrw4jgOLnyQ8KXey5J8=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "bdb6355009562d8f9313d9460c0d3860f525bc6c",
+        "rev": "6fc8bded78715cdd43a3278a14ded226eb3a239e",
         "type": "github"
       },
       "original": {
diff --git a/nix/treefmt/flake-module.nix b/nix/treefmt/flake-module.nix
index 4aef50e..5c82312 100644
--- a/nix/treefmt/flake-module.nix
+++ b/nix/treefmt/flake-module.nix
@@ -8,6 +8,8 @@
       programs.nixpkgs-fmt.enable = true;
       programs.shellcheck.enable = true;
       programs.deno.enable = true;
+      programs.ruff.check = true;
+      programs.ruff.format = true;
       settings.formatter.shellcheck.options = [ "-s" "bash" ];
 
       programs.mypy = {
@@ -16,18 +18,9 @@
           pkgs.python3.pkgs.twisted
         ];
       };
-      settings.formatter.python = {
-        command = "sh";
-        options = [
-          "-eucx"
-          ''
-            ${pkgs.ruff}/bin/ruff --fix "$@"
-            ${pkgs.ruff}/bin/ruff format "$@"
-          ''
-          "--" # this argument is ignored by bash
-        ];
-        includes = [ "*.py" ];
-      };
+
+      settings.formatter.ruff-check.priority = 1;
+      settings.formatter.ruff-format.priority = 2;
     };
   };
 }