diff --git a/flake.lock b/flake.lock
index 0622fe8..8cf6324 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,17 +2,18 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1700851152,
-        "narHash": "sha256-3PWITNJZyA3jz5IGREJRfSykM6xSLmD8u5A3WpBCyDM=",
-        "owner": "NixOS",
+        "lastModified": 1700907157,
+        "narHash": "sha256-n71E17bx1cpSDJOxcB3G9UxjUUIzsIvdyY2oWAiiKv4=",
+        "owner": "natsukium",
         "repo": "nixpkgs",
-        "rev": "1216a5ba22a93a4a3a3bfdb4bff0f4727c576fcc",
+        "rev": "483af9297efc85e6bf0c7045cc07b685e31ca6a8",
         "type": "github"
       },
       "original": {
-        "id": "nixpkgs",
-        "ref": "nixos-23.05",
-        "type": "indirect"
+        "owner": "natsukium",
+        "ref": "pydantic2",
+        "repo": "nixpkgs",
+        "type": "github"
       }
     },
     "root": {
diff --git a/flake.nix b/flake.nix
index 535acf8..85f223f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,7 +3,8 @@
 
   inputs = {
     nixpkgs = {
-      url = "nixpkgs/nixos-23.05";
+      # url = "nixpkgs/nixos-23.05";
+      url = "github:natsukium/nixpkgs/pydantic2";
     };
   };
 
@@ -61,8 +62,8 @@
     packages.${system} = {
       healthchecks = let
         pname = "healthchecks";
-        version = "2.10";
-        hash = "sha256-1x+pYMHaKgLFWcL1axOv/ok1ebs0I7Q+Q6htncmgJzU=";
+        version = "3.0.1";
+        hash = "sha256-r8wzIZPetnTEJDKPx/Oxk+gzs8gbjEHSi40LSxLb1Js=";
         localSettings = pkgs.writeText "local_settings.py" ''
           import os
           CSRF_TRUSTED_HOSTS = os.getenv("CSRF_TRUSTED_HOSTS", "").split(",")