diff --git a/default.nix b/default.nix
index 399ee97c..78141093 100644
--- a/default.nix
+++ b/default.nix
@@ -8,7 +8,7 @@ let
   testArgs = if debug then "" else "--release";
 in
 with pkgs;
-llvmPackages_11.stdenv.mkDerivation rec {
+llvmPackages_13.stdenv.mkDerivation rec {
   name = "kime";
   src = ./.;
   buildInputs = deps.kimeBuildInputs;
@@ -16,9 +16,9 @@ llvmPackages_11.stdenv.mkDerivation rec {
   version = kimeVersion;
   cargoDeps = rustPlatform.fetchCargoTarball {
     inherit src;
-    sha256 = "sha256-j3S457qDgHEcKC9FraiYsj/ykHB/cJVNLI2H/XcRDUk=";
+    sha256 = "sha256-GvBnNPY51RPt+I73oet5tB/EE2UsEPKbelJZkSY3xNw=";
   };
-  LIBCLANG_PATH = "${pkgs.llvmPackages_11.libclang}/lib";
+  LIBCLANG_PATH = "${pkgs.llvmPackages_13.libclang.lib}/lib";
   dontUseCmakeConfigure = true;
   dontWrapQtApps = true;
   buildPhase = if debug then "bash scripts/build.sh -ad" else "bash scripts/build.sh -ar";
diff --git a/flake.lock b/flake.lock
index ad78452f..21747524 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "flake-utils": {
       "locked": {
-        "lastModified": 1623875721,
-        "narHash": "sha256-A8BU7bjS5GirpAUv4QA+QnJ4CceLHkcXdRp4xITDB0s=",
+        "lastModified": 1631561581,
+        "narHash": "sha256-3VQMV5zvxaVLvqqUrNz3iJelLw30mIVSfZmAaauM3dA=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "f7e004a55b120c02ecb6219596820fcd32ca8772",
+        "rev": "7e5bf3925f6fbdfaf50a2a7ca0be2879c4261d19",
         "type": "github"
       },
       "original": {
@@ -17,17 +17,17 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1617987980,
-        "narHash": "sha256-0D5vcBHvccMIpdZN9h4TqPGdiiRuGMpaO4jaj4iJu50=",
+        "lastModified": 1633254510,
+        "narHash": "sha256-6I4cnC6CUjBNXaLXHF+nbTfqTYPGlpAM7SsJasC2gF4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "ae09772927566314ad11e366ddb46a9c7ffb666a",
+        "rev": "22374e17050f0a4453a3256c6473177b553a72be",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "ae09772927566314ad11e366ddb46a9c7ffb666a",
+        "rev": "22374e17050f0a4453a3256c6473177b553a72be",
         "type": "github"
       }
     },
diff --git a/flake.nix b/flake.nix
index f3617a28..a0670b6e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,7 +2,7 @@
   description = "A very basic flake";
 
   inputs = {
-    nixpkgs.url = github:NixOS/nixpkgs?rev=ae09772927566314ad11e366ddb46a9c7ffb666a;
+    nixpkgs.url = github:NixOS/nixpkgs?rev=22374e17050f0a4453a3256c6473177b553a72be;
     flake-utils.url = github:numtide/flake-utils;
   };
 
diff --git a/nix/deps.nix b/nix/deps.nix
index 9026c25d..96c60218 100644
--- a/nix/deps.nix
+++ b/nix/deps.nix
@@ -22,9 +22,9 @@ with pkgs;
   kimeNativeBuildInputs = [
     bash
     pkg-config
-    clang_11
-    llvmPackages_11.libclang
-    llvmPackages_11.bintools
+    llvmPackages_13.clang
+    llvmPackages_13.libclang.lib
+    llvmPackages_13.bintools
     rustc cargo
     cmake
     extra-cmake-modules
diff --git a/shell.nix b/shell.nix
index 1f5e67bc..05a6863c 100644
--- a/shell.nix
+++ b/shell.nix
@@ -5,14 +5,14 @@ let
   deps = import ./nix/deps.nix { pkgs = pkgs; };
 in
 with pkgs;
-llvmPackages_11.stdenv.mkDerivation {
+llvmPackages_13.stdenv.mkDerivation {
   name = "kime-shell";
   dontUseCmakeConfigure = true;
   dontWrapQtApps = true;
   buildInputs = deps.kimeBuildInputs;
   nativeBuildInputs = deps.kimeNativeBuildInputs;
   CMAKE_EXPORT_COMPILE_COMMANDS = 1;
-  LIBCLANG_PATH = "${pkgs.llvmPackages_11.libclang}/lib";
+  LIBCLANG_PATH = "${pkgs.llvmPackages_13.libclang.lib}/lib";
   RUST_BACKTRACE = 1;
 }