diff --git a/flake.nix b/flake.nix
index f9a7710..05125cb 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,7 +6,7 @@
     nix-pre-commit-hooks.inputs.flake-utils.follows = "flake-utils";
     nix-pre-commit-hooks.inputs.nixpkgs.follows = "nixpkgs";
 
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-21.05";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-21.11";
 
     nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";