diff --git a/flake.lock b/flake.lock
index 6aea418..5bf3966 100644
--- a/flake.lock
+++ b/flake.lock
@@ -37,47 +37,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1666867875,
-        "narHash": "sha256-3nD7iQXd/J6KjkT8IjozTuA5p8qjiLKTxvOUmH+AzNM=",
+        "lastModified": 1685533922,
+        "narHash": "sha256-y4FCQpYafMQ42l1V+NUrMel9RtFtZo59PzdzflKR/lo=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "c132d0837dfb9035701dcd8fc91786c605c855c3",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "ref": "nixos-22.05",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs-mozilla": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1664789696,
-        "narHash": "sha256-UGWJHQShiwLCr4/DysMVFrYdYYHcOqAOVsWNUu+l6YU=",
-        "owner": "mozilla",
-        "repo": "nixpkgs-mozilla",
-        "rev": "80627b282705101e7b38e19ca6e8df105031b072",
-        "type": "github"
-      },
-      "original": {
-        "owner": "mozilla",
-        "repo": "nixpkgs-mozilla",
-        "type": "github"
-      }
-    },
-    "nixpkgs-unstable": {
-      "locked": {
-        "lastModified": 1665934222,
-        "narHash": "sha256-EIPSpN/LMWcKO56KnCF9xJzIOeNU5bJ83ziSgd8I54Y=",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "1087d09dfbf82e086a54390b09b353365aaf8658",
+        "rev": "3a70dd92993182f8e514700ccf5b1ae9fc8a3b8d",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
+        "ref": "nixos-23.05",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -86,9 +55,7 @@
       "inputs": {
         "flake-utils": "flake-utils",
         "naersk": "naersk",
-        "nixpkgs": "nixpkgs",
-        "nixpkgs-mozilla": "nixpkgs-mozilla",
-        "nixpkgs-unstable": "nixpkgs-unstable"
+        "nixpkgs": "nixpkgs"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index f712cb3..a35ae76 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,30 +1,16 @@
 {
   description = "A discord bot for Dự Tuyển Tổng Hợp server";
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-22.05";
-    nixpkgs-unstable.url = "github:nixos/nixpkgs";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.05";
     naersk.url = "github:nix-community/naersk";
     naersk.inputs.nixpkgs.follows = "nixpkgs";
-    nixpkgs-mozilla = {
-      url = github:mozilla/nixpkgs-mozilla;
-      flake = false;
-    };
     flake-utils.url = "github:numtide/flake-utils";
   };
-  outputs = { self, nixpkgs, nixpkgs-unstable, naersk, flake-utils, nixpkgs-mozilla }: flake-utils.lib.eachDefaultSystem (system:
+  outputs = { self, nixpkgs, naersk, flake-utils, ... }: flake-utils.lib.eachDefaultSystem (system:
     let
-      pkgs = import nixpkgs { inherit system; overlays = [ (import nixpkgs-mozilla) ]; };
-      pkgs-unstable = import nixpkgs-unstable { inherit system; };
+      pkgs = import nixpkgs { inherit system; };
 
-      rust-toolchain = (pkgs.rustChannelOf {
-        channel = "1.65.0";
-        sha256 = "sha256-DzNEaW724O8/B8844tt5AVHmSjSQ3cmzlU4BP90oRlY=";
-      });
-
-      naersk' = pkgs.callPackage naersk {
-        cargo = rust-toolchain.rust;
-        rustc = rust-toolchain.rust;
-      };
+      naersk' = pkgs.callPackage naersk { };
     in
     rec {
       packages.youmubot = naersk'.buildPackage {
@@ -56,23 +42,20 @@
       devShell = pkgs.mkShell
         {
           buildInputs =
-            with rust-toolchain; [ rust ]
-              ++ (with pkgs-unstable; [ rustfmt ])
-              ++ nixpkgs.lib.optionals pkgs.stdenv.isDarwin (with pkgs; [
-              libiconv
-              darwin.apple_sdk.frameworks.Security
-            ])
-              ++ (with pkgs; [
+            nixpkgs.lib.optionals pkgs.stdenv.isDarwin
+              (with pkgs; [
+                libiconv
+                darwin.apple_sdk.frameworks.Security
+              ])
+            ++ (with pkgs; [
               openssl
+              cargo
+              rustfmt
             ]);
 
           nativeBuildInputs = nixpkgs.lib.optionals pkgs.stdenv.isLinux (with pkgs; [
             pkg-config
           ]);
-
-          shellHook = ''
-            export RUST_SRC_PATH="${rust-toolchain.rust-src}/lib/rustlib/src/rust/library";
-          '';
         };
       # module
       nixosModule = import ./module.nix defaultPackage;